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data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Tartalomjegyzék</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">áthelyezés az oldalsávba</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">elrejtés</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Bevezető</div> </a> </li> <li id="toc-A_szám_a_matematikában" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#A_szám_a_matematikában"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>A szám a matematikában</span> </div> </a> <ul id="toc-A_szám_a_matematikában-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-A_szám_mint_sorszám,_jelzés" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#A_szám_mint_sorszám,_jelzés"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>A szám mint sorszám, jelzés</span> </div> </a> <ul id="toc-A_szám_mint_sorszám,_jelzés-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-A_szám_mint_jel,_kód" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#A_szám_mint_jel,_kód"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>A szám mint jel, kód</span> </div> </a> <ul id="toc-A_szám_mint_jel,_kód-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Kulturális_vonatkozások" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Kulturális_vonatkozások"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Kulturális vonatkozások</span> </div> </a> <ul id="toc-Kulturális_vonatkozások-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Jegyzetek" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Jegyzetek"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Jegyzetek</span> </div> </a> <ul id="toc-Jegyzetek-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Tartalomjegyzék" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Tartalomjegyzék kinyitása/becsukása" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Tartalomjegyzék kinyitása/becsukása</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">28 (szám)</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Ugrás egy más nyelvű szócikkre. Elérhető 92 nyelven" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-92" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">92 nyelv</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/28_(number)" title="28 (number) – angol" lang="en" hreflang="en" data-title="28 (number)" data-language-autonym="English" data-language-local-name="angol" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-ab mw-list-item"><a href="https://ab.wikipedia.org/wiki/28_(%D0%B0%D1%85%D1%8B%D4%A5%D1%85%D1%8C%D0%B0%D3%A1%D0%B0%D1%80%D0%B0)" title="28 (ахыԥхьаӡара) – abház" lang="ab" hreflang="ab" data-title="28 (ахыԥхьаӡара)" data-language-autonym="Аԥсшәа" data-language-local-name="abház" class="interlanguage-link-target"><span>Аԥсшәа</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/28_(%D8%B9%D8%AF%D8%AF)" title="28 (عدد) – arab" lang="ar" hreflang="ar" data-title="28 (عدد)" data-language-autonym="العربية" data-language-local-name="arab" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ary mw-list-item"><a href="https://ary.wikipedia.org/wiki/28" title="28 – Moroccan Arabic" lang="ary" hreflang="ary" data-title="28" data-language-autonym="الدارجة" data-language-local-name="Moroccan Arabic" class="interlanguage-link-target"><span>الدارجة</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/28_(%C9%99d%C9%99d)" title="28 (ədəd) – azerbajdzsáni" lang="az" hreflang="az" data-title="28 (ədəd)" data-language-autonym="Azərbaycanca" data-language-local-name="azerbajdzsáni" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-azb mw-list-item"><a href="https://azb.wikipedia.org/wiki/%DB%B2%DB%B8_(%D8%B3%D8%A7%DB%8C%DB%8C)" title="۲۸ (سایی) – South Azerbaijani" lang="azb" hreflang="azb" data-title="۲۸ (سایی)" data-language-autonym="تۆرکجه" data-language-local-name="South Azerbaijani" class="interlanguage-link-target"><span>تۆرکجه</span></a></li><li class="interlanguage-link interwiki-ban mw-list-item"><a href="https://ban.wikipedia.org/wiki/28_(angka)" title="28 (angka) – balinéz" lang="ban" hreflang="ban" data-title="28 (angka)" data-language-autonym="Basa Bali" data-language-local-name="balinéz" class="interlanguage-link-target"><span>Basa Bali</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/28_(%D1%87%D0%B8%D1%81%D0%BB%D0%BE)" title="28 (число) – bolgár" lang="bg" hreflang="bg" data-title="28 (число)" data-language-autonym="Български" data-language-local-name="bolgár" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bo mw-list-item"><a href="https://bo.wikipedia.org/wiki/%E0%BC%A2%E0%BC%A8_(%E0%BD%82%E0%BE%B2%E0%BD%84%E0%BD%A6%E0%BC%8B%E0%BD%80%E0%BC%8D)" title="༢༨ (གྲངས་ཀ།) – tibeti" lang="bo" hreflang="bo" data-title="༢༨ (གྲངས་ཀ།)" data-language-autonym="བོད་ཡིག" data-language-local-name="tibeti" class="interlanguage-link-target"><span>བོད་ཡིག</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Vint-i-vuit" title="Vint-i-vuit – katalán" lang="ca" hreflang="ca" data-title="Vint-i-vuit" data-language-autonym="Català" data-language-local-name="katalán" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cdo mw-list-item"><a href="https://cdo.wikipedia.org/wiki/28" title="28 – Mindong" lang="cdo" hreflang="cdo" data-title="28" data-language-autonym="閩東語 / Mìng-dĕ̤ng-ngṳ̄" data-language-local-name="Mindong" class="interlanguage-link-target"><span>閩東語 / Mìng-dĕ̤ng-ngṳ̄</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%D9%A2%D9%A8_(%DA%98%D9%85%D8%A7%D8%B1%DB%95)" title="٢٨ (ژمارە) – közép-ázsiai kurd" lang="ckb" hreflang="ckb" data-title="٢٨ (ژمارە)" data-language-autonym="کوردی" data-language-local-name="közép-ázsiai kurd" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/28_(%C4%8D%C3%ADslo)" title="28 (číslo) – cseh" lang="cs" hreflang="cs" data-title="28 (číslo)" data-language-autonym="Čeština" data-language-local-name="cseh" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-cv mw-list-item"><a href="https://cv.wikipedia.org/wiki/28_(%D1%85%D0%B8%D1%81%D0%B5%D0%BF)" title="28 (хисеп) – csuvas" lang="cv" hreflang="cv" data-title="28 (хисеп)" data-language-autonym="Чӑвашла" data-language-local-name="csuvas" class="interlanguage-link-target"><span>Чӑвашла</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/28_(tal)" title="28 (tal) – dán" lang="da" hreflang="da" data-title="28 (tal)" data-language-autonym="Dansk" data-language-local-name="dán" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Achtundzwanzig" title="Achtundzwanzig – német" lang="de" hreflang="de" data-title="Achtundzwanzig" data-language-autonym="Deutsch" data-language-local-name="német" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/28_(%CE%B1%CF%81%CE%B9%CE%B8%CE%BC%CF%8C%CF%82)" title="28 (αριθμός) – görög" lang="el" hreflang="el" data-title="28 (αριθμός)" data-language-autonym="Ελληνικά" data-language-local-name="görög" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-eml mw-list-item"><a href="https://eml.wikipedia.org/wiki/28_(n%C3%B9mer)" title="28 (nùmer) – Emiliano-Romagnolo" lang="egl" hreflang="egl" data-title="28 (nùmer)" data-language-autonym="Emiliàn e rumagnòl" data-language-local-name="Emiliano-Romagnolo" class="interlanguage-link-target"><span>Emiliàn e rumagnòl</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/28_(nombro)" title="28 (nombro) – eszperantó" lang="eo" hreflang="eo" data-title="28 (nombro)" data-language-autonym="Esperanto" data-language-local-name="eszperantó" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Veintiocho" title="Veintiocho – spanyol" lang="es" hreflang="es" data-title="Veintiocho" data-language-autonym="Español" data-language-local-name="spanyol" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Hogeita_zortzi" title="Hogeita zortzi – baszk" lang="eu" hreflang="eu" data-title="Hogeita zortzi" data-language-autonym="Euskara" data-language-local-name="baszk" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%DB%B2%DB%B8_(%D8%B9%D8%AF%D8%AF)" title="۲۸ (عدد) – perzsa" lang="fa" hreflang="fa" data-title="۲۸ (عدد)" data-language-autonym="فارسی" data-language-local-name="perzsa" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/28_(luku)" title="28 (luku) – finn" lang="fi" hreflang="fi" data-title="28 (luku)" data-language-autonym="Suomi" data-language-local-name="finn" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fj mw-list-item"><a href="https://fj.wikipedia.org/wiki/Rua_ka_walu" title="Rua ka walu – fidzsi" lang="fj" hreflang="fj" data-title="Rua ka walu" data-language-autonym="Na Vosa Vakaviti" data-language-local-name="fidzsi" class="interlanguage-link-target"><span>Na Vosa Vakaviti</span></a></li><li class="interlanguage-link interwiki-fo mw-list-item"><a href="https://fo.wikipedia.org/wiki/28_(tal)" title="28 (tal) – feröeri" lang="fo" hreflang="fo" data-title="28 (tal)" data-language-autonym="Føroyskt" data-language-local-name="feröeri" class="interlanguage-link-target"><span>Føroyskt</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/28_(nombre)" title="28 (nombre) – francia" lang="fr" hreflang="fr" data-title="28 (nombre)" data-language-autonym="Français" data-language-local-name="francia" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/28_(uimhir)" title="28 (uimhir) – ír" lang="ga" hreflang="ga" data-title="28 (uimhir)" data-language-autonym="Gaeilge" data-language-local-name="ír" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gan mw-list-item"><a href="https://gan.wikipedia.org/wiki/28" title="28 – gan kínai" lang="gan" hreflang="gan" data-title="28" data-language-autonym="贛語" data-language-local-name="gan kínai" class="interlanguage-link-target"><span>贛語</span></a></li><li class="interlanguage-link interwiki-ha mw-list-item"><a href="https://ha.wikipedia.org/wiki/28_(al%C6%99alami)" title="28 (alƙalami) – hausza" lang="ha" hreflang="ha" data-title="28 (alƙalami)" data-language-autonym="Hausa" data-language-local-name="hausza" class="interlanguage-link-target"><span>Hausa</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/28_(%D7%9E%D7%A1%D7%A4%D7%A8)" title="28 (מספר) – héber" lang="he" hreflang="he" data-title="28 (מספר)" data-language-autonym="עברית" data-language-local-name="héber" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-ht mw-list-item"><a href="https://ht.wikipedia.org/wiki/28_(nonm)" title="28 (nonm) – haiti kreol" lang="ht" hreflang="ht" data-title="28 (nonm)" data-language-autonym="Kreyòl ayisyen" data-language-local-name="haiti kreol" class="interlanguage-link-target"><span>Kreyòl ayisyen</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/28_(%D5%A9%D5%AB%D5%BE)" title="28 (թիվ) – örmény" lang="hy" hreflang="hy" data-title="28 (թիվ)" data-language-autonym="Հայերեն" data-language-local-name="örmény" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-ia mw-list-item"><a href="https://ia.wikipedia.org/wiki/28_(numero)" title="28 (numero) – interlingva" lang="ia" hreflang="ia" data-title="28 (numero)" data-language-autonym="Interlingua" data-language-local-name="interlingva" class="interlanguage-link-target"><span>Interlingua</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/28_(angka)" title="28 (angka) – indonéz" lang="id" hreflang="id" data-title="28 (angka)" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonéz" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-ik mw-list-item"><a href="https://ik.wikipedia.org/wiki/I%C3%B1ui%C3%B1aq_tallimat_pi%C5%8Basut" title="Iñuiñaq tallimat piŋasut – inupiak" lang="ik" hreflang="ik" data-title="Iñuiñaq tallimat piŋasut" data-language-autonym="Iñupiatun" data-language-local-name="inupiak" class="interlanguage-link-target"><span>Iñupiatun</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/28_(numero)" title="28 (numero) – olasz" lang="it" hreflang="it" data-title="28 (numero)" data-language-autonym="Italiano" data-language-local-name="olasz" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/28" title="28 – japán" lang="ja" hreflang="ja" data-title="28" data-language-autonym="日本語" data-language-local-name="japán" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/28_(%E1%83%A0%E1%83%98%E1%83%AA%E1%83%AE%E1%83%95%E1%83%98)" title="28 (რიცხვი) – grúz" lang="ka" hreflang="ka" data-title="28 (რიცხვი)" data-language-autonym="ქართული" data-language-local-name="grúz" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-kcg mw-list-item"><a href="https://kcg.wikipedia.org/wiki/28_(la%CC%B1mba)" title="28 (la̱mba) – tyap" lang="kcg" hreflang="kcg" data-title="28 (la̱mba)" data-language-autonym="Tyap" data-language-local-name="tyap" class="interlanguage-link-target"><span>Tyap</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/28" title="28 – koreai" lang="ko" hreflang="ko" data-title="28" data-language-autonym="한국어" data-language-local-name="koreai" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-ks mw-list-item"><a href="https://ks.wikipedia.org/wiki/28_(%DA%AF%D8%B1%D9%8E%D9%9B%D9%86%D9%9B%D8%AF)" title="28 (گرَٛنٛد) – kasmíri" lang="ks" hreflang="ks" data-title="28 (گرَٛنٛد)" data-language-autonym="कॉशुर / کٲشُر" data-language-local-name="kasmíri" class="interlanguage-link-target"><span>कॉशुर / کٲشُر</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Duodetriginta" title="Duodetriginta – latin" lang="la" hreflang="la" data-title="Duodetriginta" data-language-autonym="Latina" data-language-local-name="latin" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-lbe mw-list-item"><a href="https://lbe.wikipedia.org/wiki/%D0%9A%D1%8C%D1%83%D0%BD%D0%B8%D1%8F_%D0%BC%D1%8F%D0%B9%D0%B2%D0%B0" title="Кьуния мяйва – Lak" lang="lbe" hreflang="lbe" data-title="Кьуния мяйва" data-language-autonym="Лакку" data-language-local-name="Lak" class="interlanguage-link-target"><span>Лакку</span></a></li><li class="interlanguage-link interwiki-lg mw-list-item"><a href="https://lg.wikipedia.org/wiki/Amakumi_abiri_mu_munaana" title="Amakumi abiri mu munaana – ganda" lang="lg" hreflang="lg" data-title="Amakumi abiri mu munaana" data-language-autonym="Luganda" data-language-local-name="ganda" class="interlanguage-link-target"><span>Luganda</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/28_(skaitlis)" title="28 (skaitlis) – lett" lang="lv" hreflang="lv" data-title="28 (skaitlis)" data-language-autonym="Latviešu" data-language-local-name="lett" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-mai mw-list-item"><a href="https://mai.wikipedia.org/wiki/%E0%A5%A8%E0%A5%AE" title="२८ – maithili" lang="mai" hreflang="mai" data-title="२८" data-language-autonym="मैथिली" data-language-local-name="maithili" class="interlanguage-link-target"><span>मैथिली</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/28_(%D0%B1%D1%80%D0%BE%D1%98)" title="28 (број) – macedón" lang="mk" hreflang="mk" data-title="28 (број)" data-language-autonym="Македонски" data-language-local-name="macedón" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/28_(%E0%B4%B8%E0%B4%82%E0%B4%96%E0%B5%8D%E0%B4%AF)" title="28 (സംഖ്യ) – malajálam" lang="ml" hreflang="ml" data-title="28 (സംഖ്യ)" data-language-autonym="മലയാളം" data-language-local-name="malajálam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-mni mw-list-item"><a href="https://mni.wikipedia.org/wiki/%EA%AF%B2%EA%AF%B8" title="꯲꯸ – manipuri" lang="mni" hreflang="mni" data-title="꯲꯸" data-language-autonym="ꯃꯤꯇꯩ ꯂꯣꯟ" data-language-local-name="manipuri" class="interlanguage-link-target"><span>ꯃꯤꯇꯩ ꯂꯣꯟ</span></a></li><li class="interlanguage-link interwiki-mr mw-list-item"><a href="https://mr.wikipedia.org/wiki/%E0%A5%A8%E0%A5%AE_(%E0%A4%B8%E0%A4%82%E0%A4%96%E0%A5%8D%E0%A4%AF%E0%A4%BE)" title="२८ (संख्या) – maráthi" lang="mr" hreflang="mr" data-title="२८ (संख्या)" data-language-autonym="मराठी" data-language-local-name="maráthi" class="interlanguage-link-target"><span>मराठी</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/28_(nombor)" title="28 (nombor) – maláj" lang="ms" hreflang="ms" data-title="28 (nombor)" data-language-autonym="Bahasa Melayu" data-language-local-name="maláj" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-myv mw-list-item"><a href="https://myv.wikipedia.org/wiki/28_(%D0%BB%D0%BE%D0%B2%D0%BE%D0%BC%D0%B0_%D0%B2%D0%B0%D0%BB)" title="28 (ловома вал) – erzjány" lang="myv" hreflang="myv" data-title="28 (ловома вал)" data-language-autonym="Эрзянь" data-language-local-name="erzjány" class="interlanguage-link-target"><span>Эрзянь</span></a></li><li class="interlanguage-link interwiki-mzn mw-list-item"><a href="https://mzn.wikipedia.org/wiki/%DB%B2%DB%B8_(%D8%B9%D8%AF%D8%AF)" title="۲۸ (عدد) – mázanderáni" lang="mzn" hreflang="mzn" data-title="۲۸ (عدد)" data-language-autonym="مازِرونی" data-language-local-name="mázanderáni" class="interlanguage-link-target"><span>مازِرونی</span></a></li><li class="interlanguage-link interwiki-nah mw-list-item"><a href="https://nah.wikipedia.org/wiki/C%C4%93mp%C5%8Dhualchicu%C4%93yi" title="Cēmpōhualchicuēyi – Nahuatl" lang="nah" hreflang="nah" data-title="Cēmpōhualchicuēyi" data-language-autonym="Nāhuatl" data-language-local-name="Nahuatl" class="interlanguage-link-target"><span>Nāhuatl</span></a></li><li class="interlanguage-link interwiki-nap mw-list-item"><a href="https://nap.wikipedia.org/wiki/Vint%C3%B2tte" title="Vintòtte – nápolyi" lang="nap" hreflang="nap" data-title="Vintòtte" data-language-autonym="Napulitano" data-language-local-name="nápolyi" class="interlanguage-link-target"><span>Napulitano</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/28_(getal)" title="28 (getal) – holland" lang="nl" hreflang="nl" data-title="28 (getal)" data-language-autonym="Nederlands" data-language-local-name="holland" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Talet_28" title="Talet 28 – norvég (nynorsk)" lang="nn" hreflang="nn" data-title="Talet 28" data-language-autonym="Norsk nynorsk" data-language-local-name="norvég (nynorsk)" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/28_(tall)" title="28 (tall) – norvég (bokmål)" lang="nb" hreflang="nb" data-title="28 (tall)" data-language-autonym="Norsk bokmål" data-language-local-name="norvég (bokmål)" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-nso mw-list-item"><a href="https://nso.wikipedia.org/wiki/28_(nomoro)" title="28 (nomoro) – északi szeszotó" lang="nso" hreflang="nso" data-title="28 (nomoro)" data-language-autonym="Sesotho sa Leboa" data-language-local-name="északi szeszotó" class="interlanguage-link-target"><span>Sesotho sa Leboa</span></a></li><li class="interlanguage-link interwiki-pa mw-list-item"><a href="https://pa.wikipedia.org/wiki/28" title="28 – pandzsábi" lang="pa" hreflang="pa" data-title="28" data-language-autonym="ਪੰਜਾਬੀ" data-language-local-name="pandzsábi" class="interlanguage-link-target"><span>ਪੰਜਾਬੀ</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/28_(liczba)" title="28 (liczba) – lengyel" lang="pl" hreflang="pl" data-title="28 (liczba)" data-language-autonym="Polski" data-language-local-name="lengyel" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pnb mw-list-item"><a href="https://pnb.wikipedia.org/wiki/28" title="28 – Western Punjabi" lang="pnb" hreflang="pnb" data-title="28" data-language-autonym="پنجابی" data-language-local-name="Western Punjabi" class="interlanguage-link-target"><span>پنجابی</span></a></li><li class="interlanguage-link interwiki-ps mw-list-item"><a href="https://ps.wikipedia.org/wiki/%DB%B2%DB%B8_(%D8%B9%D8%AF%D8%AF)" title="۲۸ (عدد) – pastu" lang="ps" hreflang="ps" data-title="۲۸ (عدد)" data-language-autonym="پښتو" data-language-local-name="pastu" class="interlanguage-link-target"><span>پښتو</span></a></li><li class="interlanguage-link interwiki-pt badge-Q70893996 mw-list-item" title=""><a href="https://pt.wikipedia.org/wiki/Vinte_e_oito" title="Vinte e oito – portugál" lang="pt" hreflang="pt" data-title="Vinte e oito" data-language-autonym="Português" data-language-local-name="portugál" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-rn mw-list-item"><a href="https://rn.wikipedia.org/wiki/Mirongo_ibiri_na_umunani" title="Mirongo ibiri na umunani – kirundi" lang="rn" hreflang="rn" data-title="Mirongo ibiri na umunani" data-language-autonym="Ikirundi" data-language-local-name="kirundi" class="interlanguage-link-target"><span>Ikirundi</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/28_(num%C4%83r)" title="28 (număr) – román" lang="ro" hreflang="ro" data-title="28 (număr)" data-language-autonym="Română" data-language-local-name="román" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/28_(%D1%87%D0%B8%D1%81%D0%BB%D0%BE)" title="28 (число) – orosz" lang="ru" hreflang="ru" data-title="28 (число)" data-language-autonym="Русский" data-language-local-name="orosz" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/28_(number)" title="28 (number) – Simple English" lang="en-simple" hreflang="en-simple" data-title="28 (number)" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/28_(%C5%A1tevilo)" title="28 (število) – szlovén" lang="sl" hreflang="sl" data-title="28 (število)" data-language-autonym="Slovenščina" data-language-local-name="szlovén" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-so mw-list-item"><a href="https://so.wikipedia.org/wiki/28_(tiro)" title="28 (tiro) – szomáli" lang="so" hreflang="so" data-title="28 (tiro)" data-language-autonym="Soomaaliga" data-language-local-name="szomáli" class="interlanguage-link-target"><span>Soomaaliga</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/28_(%D0%B1%D1%80%D0%BE%D1%98)" title="28 (број) – szerb" lang="sr" hreflang="sr" data-title="28 (број)" data-language-autonym="Српски / srpski" data-language-local-name="szerb" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-srn mw-list-item"><a href="https://srn.wikipedia.org/wiki/Numro_28" title="Numro 28 – szranai tongó" lang="srn" hreflang="srn" data-title="Numro 28" data-language-autonym="Sranantongo" data-language-local-name="szranai tongó" class="interlanguage-link-target"><span>Sranantongo</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/28_(tal)" title="28 (tal) – svéd" lang="sv" hreflang="sv" data-title="28 (tal)" data-language-autonym="Svenska" data-language-local-name="svéd" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-sw mw-list-item"><a href="https://sw.wikipedia.org/wiki/Ishirini_na_nane" title="Ishirini na nane – szuahéli" lang="sw" hreflang="sw" data-title="Ishirini na nane" data-language-autonym="Kiswahili" data-language-local-name="szuahéli" class="interlanguage-link-target"><span>Kiswahili</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/28" title="28 – thai" lang="th" hreflang="th" data-title="28" data-language-autonym="ไทย" data-language-local-name="thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/28_(say%C4%B1)" title="28 (sayı) – török" lang="tr" hreflang="tr" data-title="28 (sayı)" data-language-autonym="Türkçe" data-language-local-name="török" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-tt mw-list-item"><a href="https://tt.wikipedia.org/wiki/28_(%D1%81%D0%B0%D0%BD)" title="28 (сан) – tatár" lang="tt" hreflang="tt" data-title="28 (сан)" data-language-autonym="Татарча / tatarça" data-language-local-name="tatár" class="interlanguage-link-target"><span>Татарча / tatarça</span></a></li><li class="interlanguage-link interwiki-tyv mw-list-item"><a href="https://tyv.wikipedia.org/wiki/28" title="28 – tuvai" lang="tyv" hreflang="tyv" data-title="28" data-language-autonym="Тыва дыл" data-language-local-name="tuvai" class="interlanguage-link-target"><span>Тыва дыл</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/28_(%D1%87%D0%B8%D1%81%D0%BB%D0%BE)" title="28 (число) – ukrán" lang="uk" hreflang="uk" data-title="28 (число)" data-language-autonym="Українська" data-language-local-name="ukrán" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-ur mw-list-item"><a href="https://ur.wikipedia.org/wiki/28_(%D8%B9%D8%AF%D8%AF)" title="28 (عدد) – urdu" lang="ur" hreflang="ur" data-title="28 (عدد)" data-language-autonym="اردو" data-language-local-name="urdu" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/28_(son)" title="28 (son) – üzbég" lang="uz" hreflang="uz" data-title="28 (son)" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="üzbég" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-vep mw-list-item"><a href="https://vep.wikipedia.org/wiki/28_(lugu)" title="28 (lugu) – Veps" lang="vep" hreflang="vep" data-title="28 (lugu)" data-language-autonym="Vepsän kel’" data-language-local-name="Veps" class="interlanguage-link-target"><span>Vepsän kel’</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/28_(s%E1%BB%91)" title="28 (số) – vietnámi" lang="vi" hreflang="vi" data-title="28 (số)" data-language-autonym="Tiếng Việt" data-language-local-name="vietnámi" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-vls mw-list-item"><a href="https://vls.wikipedia.org/wiki/28_(getal)" title="28 (getal) – West Flemish" lang="vls" hreflang="vls" data-title="28 (getal)" data-language-autonym="West-Vlams" data-language-local-name="West Flemish" class="interlanguage-link-target"><span>West-Vlams</span></a></li><li class="interlanguage-link interwiki-war mw-list-item"><a href="https://war.wikipedia.org/wiki/28_(ihap)" title="28 (ihap) – varaó" lang="war" hreflang="war" data-title="28 (ihap)" data-language-autonym="Winaray" data-language-local-name="varaó" class="interlanguage-link-target"><span>Winaray</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/28" title="28 – wu kínai" lang="wuu" hreflang="wuu" data-title="28" data-language-autonym="吴语" data-language-local-name="wu kínai" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-yi mw-list-item"><a href="https://yi.wikipedia.org/wiki/28_(%D7%A0%D7%95%D7%9E%D7%A2%D7%A8)" title="28 (נומער) – jiddis" lang="yi" hreflang="yi" data-title="28 (נומער)" data-language-autonym="ייִדיש" data-language-local-name="jiddis" class="interlanguage-link-target"><span>ייִדיש</span></a></li><li class="interlanguage-link interwiki-za mw-list-item"><a href="https://za.wikipedia.org/wiki/28" title="28 – zsuang" lang="za" hreflang="za" data-title="28" data-language-autonym="Vahcuengh" data-language-local-name="zsuang" class="interlanguage-link-target"><span>Vahcuengh</span></a></li><li class="interlanguage-link interwiki-zgh mw-list-item"><a href="https://zgh.wikipedia.org/wiki/28_(%E2%B4%B0%E2%B5%8E%E2%B4%B9%E2%B4%B0%E2%B5%8F)" title="28 (ⴰⵎⴹⴰⵏ) – marokkói tamazight" lang="zgh" hreflang="zgh" data-title="28 (ⴰⵎⴹⴰⵏ)" data-language-autonym="ⵜⴰⵎⴰⵣⵉⵖⵜ ⵜⴰⵏⴰⵡⴰⵢⵜ" data-language-local-name="marokkói tamazight" class="interlanguage-link-target"><span>ⵜⴰⵎⴰⵣⵉⵖⵜ ⵜⴰⵏⴰⵡⴰⵢⵜ</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/28" title="28 – kínai" lang="zh" hreflang="zh" data-title="28" data-language-autonym="中文" data-language-local-name="kínai" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/28" title="28 – min nan kínai" lang="nan" hreflang="nan" data-title="28" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="min nan kínai" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/28" title="28 – kantoni" lang="yue" hreflang="yue" data-title="28" data-language-autonym="粵語" data-language-local-name="kantoni" class="interlanguage-link-target"><span>粵語</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q587465#sitelinks-wikipedia" title="Nyelvközi hivatkozások szerkesztése" class="wbc-editpage">Hivatkozások szerkesztése</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Névterek"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/28_(sz%C3%A1m)" title="A lap megtekintése [c]" accesskey="c"><span>Szócikk</span></a></li><li id="ca-talk" class="new vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Vita:28_(sz%C3%A1m)&action=edit&redlink=1" rel="discussion" class="new" title="Az oldal tartalmának megvitatása (a lap nem létezik) [t]" accesskey="t"><span>Vitalap</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" 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href="/wiki/28_(sz%C3%A1m)"><span>Olvasás</span></a></li><li id="ca-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=28_(sz%C3%A1m)&action=edit" title="Az oldal forráskódjának szerkesztése [e]" accesskey="e"><span>Szerkesztés</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=28_(sz%C3%A1m)&action=history" title="A lap korábbi változatai [h]" accesskey="h"><span>Laptörténet</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Oldal eszközök"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="Eszközök" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Eszközök</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Eszközök</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">áthelyezés az oldalsávba</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">elrejtés</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="További lehetőségek" > <div class="vector-menu-heading"> Műveletek </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/28_(sz%C3%A1m)"><span>Olvasás</span></a></li><li id="ca-more-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=28_(sz%C3%A1m)&action=edit" title="Az oldal forráskódjának szerkesztése [e]" accesskey="e"><span>Szerkesztés</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=28_(sz%C3%A1m)&action=history"><span>Laptörténet</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> Általános </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Speci%C3%A1lis:Mi_hivatkozik_erre/28_(sz%C3%A1m)" title="Az erre a lapra hivatkozó más lapok listája [j]" accesskey="j"><span>Mi hivatkozik erre?</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Speci%C3%A1lis:Kapcsol%C3%B3d%C3%B3_v%C3%A1ltoztat%C3%A1sok/28_(sz%C3%A1m)" rel="nofollow" title="Az erről a lapról hivatkozott lapok utolsó változtatásai [k]" accesskey="k"><span>Kapcsolódó változtatások</span></a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Speci%C3%A1lis:Speci%C3%A1lis_lapok" title="Az összes speciális lap listája [q]" accesskey="q"><span>Speciális lapok</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=28_(sz%C3%A1m)&oldid=26504646" title="Állandó hivatkozás ezen lap ezen változatához"><span>Hivatkozás erre a változatra</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=28_(sz%C3%A1m)&action=info" title="További információk erről a lapról"><span>Lapinformációk</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Speci%C3%A1lis:Hivatkoz%C3%A1s&page=28_%28sz%C3%A1m%29&id=26504646&wpFormIdentifier=titleform" title="Információk a lap idézésével kapcsolatban"><span>Hogyan hivatkozz erre a lapra?</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Speci%C3%A1lis:UrlShortener&url=https%3A%2F%2Fhu.wikipedia.org%2Fwiki%2F28_%28sz%25C3%25A1m%29"><span>Rövidített URL készítése</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Speci%C3%A1lis:QrCode&url=https%3A%2F%2Fhu.wikipedia.org%2Fwiki%2F28_%28sz%25C3%25A1m%29"><span>QR-kód letöltése</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Nyomtatás/exportálás </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-create_a_book" class="mw-list-item"><a href="/w/index.php?title=Speci%C3%A1lis:K%C3%B6nyv&bookcmd=book_creator&referer=28+%28sz%C3%A1m%29"><span>Könyv készítése</span></a></li><li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Speci%C3%A1lis:DownloadAsPdf&page=28_%28sz%C3%A1m%29&action=show-download-screen"><span>Letöltés PDF-ként</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=28_(sz%C3%A1m)&printable=yes" title="A lap nyomtatható változata [p]" accesskey="p"><span>Nyomtatható változat</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> Társprojektek </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="wb-otherproject-link wb-otherproject-commons mw-list-item"><a href="https://commons.wikimedia.org/wiki/Category:28_(number)" hreflang="en"><span>Wikimédia Commons</span></a></li><li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q587465" title="Kapcsolt adattárelem [g]" accesskey="g"><span>Wikidata-adatlap</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Oldal eszközök"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Megjelenés"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Megjelenés</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">áthelyezés az oldalsávba</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">elrejtés</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> <div id="mw-indicator-indicator-fr-review-status" class="mw-indicator"><indicator name="fr-review-status" class="mw-fr-review-status-indicator" id="mw-fr-revision-toggle"><span class="cdx-fr-css-icon-review--status--stable"></span><b>Ellenőrzött</b></indicator></div> </div> <div id="siteSub" class="noprint">A Wikipédiából, a szabad enciklopédiából</div> </div> <div id="contentSub"><div id="mw-content-subtitle"><div id="mw-fr-revision-messages"><div id="mw-fr-revision-details" class="mw-fr-revision-details-dialog" style="display:none;"><div tabindex="0"></div><div class="cdx-dialog cdx-dialog--horizontal-actions"><header class="cdx-dialog__header cdx-dialog__header--default"><div class="cdx-dialog__header__title-group"><h2 class="cdx-dialog__header__title">Változat állapota</h2><p class="cdx-dialog__header__subtitle">Ez a lap egy ellenőrzött változata</p></div><button class="cdx-button cdx-button--action-default cdx-button--weight-quiet
							cdx-button--size-medium cdx-button--icon-only cdx-dialog__header__close-button" aria-label="Close" onclick="document.getElementById("mw-fr-revision-details").style.display = "none";" type="submit"><span class="cdx-icon cdx-icon--medium
							cdx-fr-css-icon--close"></span></button></header><div class="cdx-dialog__body">Ez a <a href="/wiki/Wikip%C3%A9dia:Jel%C3%B6lt_lapv%C3%A1ltozatok" title="Wikipédia:Jelölt lapváltozatok">közzétett változat</a>, <a class="external text" href="https://hu.wikipedia.org/w/index.php?title=Speci%C3%A1lis:Rendszernapl%C3%B3k&type=review&page=28_(sz%C3%A1m)">ellenőrizve</a>: <i>2024. június 15.</i><p><table id="mw-fr-revisionratings-box" class="flaggedrevs-color-1" style="margin: auto;" cellpadding="0"><tr><td class="fr-text" style="vertical-align: middle;">Pontosság</td><td class="fr-value40" style="vertical-align: middle;">ellenőrzött</td></tr></table></p></div></div><div tabindex="0"></div></div></div></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="hu" dir="ltr"><table class="dablink noprint noviewer" style="padding-left: 2em; vertical-align: middle;" cellpadding="0" cellspacing="0"><tbody><tr><td style="padding-right:.25em;"><span typeof="mw:File"><a href="/wiki/F%C3%A1jl:Disambig.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/7/72/Disambig.svg/19px-Disambig.svg.png" decoding="async" width="19" height="15" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/72/Disambig.svg/29px-Disambig.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/72/Disambig.svg/38px-Disambig.svg.png 2x" data-file-width="230" data-file-height="183" /></a></span></td><td><i>Ez a szócikk a huszonnyolcas számról szól. A 28. évről szóló cikket lásd itt: <a href="/wiki/28" title="28">28</a>. </i></td></tr></tbody></table> <table class="infobox ujinfobox"> <tbody><tr><td colspan="2" class="fejlec matematikainfobox" style="color:black;background-color:#7bba6a;">28<br /> <small style="font-style:italic;">(huszonnyolc)</small></td></tr><tr><td colspan="2" style="text-align:center;"><div style="text-align:center"><small>… <a href="/wiki/24_(sz%C3%A1m)" title="24 (szám)">24</a> <a href="/wiki/25_(sz%C3%A1m)" title="25 (szám)">25</a> <a href="/wiki/26_(sz%C3%A1m)" title="26 (szám)">26</a> <a href="/wiki/27_(sz%C3%A1m)" title="27 (szám)">27</a> </small><b>« 28 »</b><small> <a href="/wiki/29_(sz%C3%A1m)" title="29 (szám)">29</a> <a href="/wiki/30_(sz%C3%A1m)" title="30 (szám)">30</a> <a href="/wiki/31_(sz%C3%A1m)" title="31 (szám)">31</a> <a href="/wiki/32_(sz%C3%A1m)" title="32 (szám)">32</a> …</small></div><div style="text-align:center"><small>… <a href="/wiki/0_(sz%C3%A1m)" title="0 (szám)">0</a> <a href="/wiki/10_(sz%C3%A1m)" title="10 (szám)">10</a> <a href="/wiki/20_(sz%C3%A1m)" title="20 (szám)">20</a> </small>•<small> <a href="/wiki/30_(sz%C3%A1m)" title="30 (szám)">30</a> <a href="/wiki/40_(sz%C3%A1m)" title="40 (szám)">40</a> <a href="/wiki/50_(sz%C3%A1m)" title="50 (szám)">50</a> <a href="/wiki/60_(sz%C3%A1m)" title="60 (szám)">60</a> …</small></div> <div style="text-align:center"><small>… <a href="/wiki/0_(sz%C3%A1m)" title="0 (szám)">0</a> </small>•<small> <a href="/wiki/100_(sz%C3%A1m)" title="100 (szám)">100</a> <a href="/wiki/200_(sz%C3%A1m)" title="200 (szám)">200</a> <a href="/wiki/300_(sz%C3%A1m)" title="300 (szám)">300</a> <a href="/wiki/400_(sz%C3%A1m)" title="400 (szám)">400</a> …</small></div></td></tr><tr><td class="fejezet" colspan="2" style="padding:1px 0px;background-color:#7bba6a;color:black;text-align:center;"><b>Tulajdonságok</b></td></tr><tr valign="top"><td class="cimke" style="padding:0px 3px 0px 0px;"><b><a href="/wiki/Norm%C3%A1lalak" title="Normálalak">Normálalak</a></b></td><td>2,8 · 10<sup>1</sup></td></tr><tr valign="top"><td class="cimke" style="padding:0px 3px 0px 0px;"><b><a href="/wiki/Kanonikus_alak#Számelmélet" title="Kanonikus alak">Kanonikus alak</a></b></td><td>2<sup>2</sup> · 7</td></tr><tr valign="top"><td class="cimke" style="padding:0px 3px 0px 0px;"><b><a href="/wiki/Oszthat%C3%B3s%C3%A1g" title="Oszthatóság">Osztók</a></b></td><td>1, 2, 4, 7, 14, 28</td></tr><tr valign="top"><td class="cimke" style="padding:0px 3px 0px 0px;"><b><a href="/wiki/R%C3%B3mai_sz%C3%A1m%C3%ADr%C3%A1s" title="Római számírás">Római számmal</a></b></td><td>XXVIII</td></tr><tr><td class="fejezet" colspan="2" style="padding:3px 2px;background-color:#7bba6a;color:black;text-align:center;"><b>Számrendszerek</b></td></tr><tr valign="top"><td class="cimke" style="padding:0px 3px 0px 0px;"><b><a href="/wiki/Kettes_sz%C3%A1mrendszer" title="Kettes számrendszer">Bináris alak</a></b></td><td>11100<sub>2</sub></td></tr><tr valign="top"><td class="cimke" style="padding:0px 3px 0px 0px;"><b><a href="/wiki/Nyolcas_sz%C3%A1mrendszer" title="Nyolcas számrendszer">Oktális alak</a></b></td><td>34<sub>8</sub></td></tr><tr valign="top"><td class="cimke" style="padding:0px 3px 0px 0px;"><b><a href="/wiki/Tizenhatos_sz%C3%A1mrendszer" title="Tizenhatos számrendszer">Hexadecimális alak</a></b></td><td>1C<sub>16</sub></td></tr><tr><td class="fejezet" colspan="2" style="padding:3px 2px;background-color:#7bba6a;color:black;text-align:center;"><b>Számelméleti függvények értékei</b></td></tr><tr valign="top"><td class="cimke" style="padding:0px 3px 0px 0px;"><b><a href="/wiki/Euler-f%C3%BCggv%C3%A9ny" title="Euler-függvény">Euler-függvény</a></b></td><td>12</td></tr><tr valign="top"><td class="cimke" style="padding:0px 3px 0px 0px;"><b><a href="/wiki/M%C3%B6bius-f%C3%BCggv%C3%A9ny" title="Möbius-függvény">Möbius-függvény</a></b></td><td>0</td></tr><tr valign="top"><td class="cimke" style="padding:0px 3px 0px 0px;"><b><a href="/wiki/Mertens-f%C3%BCggv%C3%A9ny" title="Mertens-függvény">Mertens-függvény</a></b></td><td>−1</td></tr><tr valign="top"><td class="cimke" style="padding:0px 3px 0px 0px;"><b><a href="/wiki/Oszt%C3%B3sz%C3%A1m-f%C3%BCggv%C3%A9ny" title="Osztószám-függvény">Osztók száma</a></b></td><td>6</td></tr><tr valign="top"><td class="cimke" style="padding:0px 3px 0px 0px;"><b><a href="/wiki/Oszt%C3%B3%C3%B6sszeg-f%C3%BCggv%C3%A9ny" title="Osztóösszeg-függvény">Osztók összege</a></b></td><td>56<br /><i><a href="/wiki/T%C3%B6k%C3%A9letes_sz%C3%A1mok" title="Tökéletes számok">tökéletes szám</a></i></td></tr><tr valign="top"><td class="cimke" style="padding:0px 3px 0px 0px;"><b><a href="/wiki/Val%C3%B3dioszt%C3%B3%C3%B6sszeg-f%C3%BCggv%C3%A9ny" title="Valódiosztóösszeg-függvény">Valódiosztó-összeg</a></b></td><td><a href="/wiki/27_(sz%C3%A1m)" title="27 (szám)">27</a></td></tr></tbody></table> <p>A <b>28</b> (római számmal: XXVIII) egy <a href="/wiki/Term%C3%A9szetes_sz%C3%A1mok" title="Természetes számok">természetes szám</a>, <a href="/wiki/H%C3%A1romsz%C3%B6gsz%C3%A1mok" title="Háromszögszámok">háromszögszám</a>, az első hét pozitív egész szám összege, a második <a href="/wiki/T%C3%B6k%C3%A9letes_sz%C3%A1mok" title="Tökéletes számok">tökéletes szám</a>, <a href="/wiki/Binomi%C3%A1lis_egy%C3%BCtthat%C3%B3" title="Binomiális együttható">binomiális együttható</a>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="A_szám_a_matematikában"><span id="A_sz.C3.A1m_a_matematik.C3.A1ban"></span>A szám a matematikában</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=28_(sz%C3%A1m)&action=edit&section=1" title="Szakasz szerkesztése: A szám a matematikában"><span>szerkesztés</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>A <a href="/wiki/T%C3%ADzes_sz%C3%A1mrendszer" title="Tízes számrendszer">tízes számrendszerbeli</a> 28-as a <a href="/wiki/Kettes_sz%C3%A1mrendszer" title="Kettes számrendszer">kettes számrendszerben</a> <i>11100</i>, a <a href="/wiki/Nyolcas_sz%C3%A1mrendszer" title="Nyolcas számrendszer">nyolcas számrendszerben</a> <i>34</i>, a <a href="/wiki/Tizenhatos_sz%C3%A1mrendszer" title="Tizenhatos számrendszer">tizenhatos számrendszerben</a> <i>1C</i> alakban írható fel. </p><p>A 28 <a href="/wiki/P%C3%A1ros_%C3%A9s_p%C3%A1ratlan_sz%C3%A1mok" title="Páros és páratlan számok">páros szám</a>, <a href="/wiki/%C3%96sszetett_sz%C3%A1mok" title="Összetett számok">összetett szám</a>, <a href="/wiki/Kanonikus_alak" title="Kanonikus alak">kanonikus alakban</a> a 2<sup>2</sup> · 7 szorzattal, <a href="/wiki/Norm%C3%A1lalak" title="Normálalak">normálalakban</a> a 2,8 · 10<sup>1</sup> szorzattal írható fel. Hat <a href="/wiki/Oszthat%C3%B3s%C3%A1g" title="Oszthatóság">osztója</a> van a természetes számok halmazán, ezek növekvő sorrendben: <a href="/wiki/1_(sz%C3%A1m)" title="1 (szám)">1</a>, <a href="/wiki/2_(sz%C3%A1m)" title="2 (szám)">2</a>, <a href="/wiki/4_(sz%C3%A1m)" title="4 (szám)">4</a>, <a href="/wiki/7_(sz%C3%A1m)" title="7 (szám)">7</a>, <a href="/wiki/14_(sz%C3%A1m)" title="14 (szám)">14</a> és 28. </p><p>Önmagát kivéve az osztók összege éppen 28-cal egyenlő, így a <a href="/wiki/T%C3%B6k%C3%A9letes_sz%C3%A1mok" title="Tökéletes számok">tökéletes számok</a> közé tartozik. Tökéletes számként a <a href="/wiki/7_(sz%C3%A1m)" title="7 (szám)">7</a> <a href="/wiki/Mersenne-pr%C3%ADm" class="mw-redirect" title="Mersenne-prím">Mersenne-prímhez</a> köthető, mivel 2<sup>(3 − 1)</sup>(2<sup>3</sup> − 1) = 28. Saját magán kívül egyetlen szám <a href="/wiki/Oszt%C3%B3%C3%B6sszeg-sorozat" title="Osztóösszeg-sorozat">valódiosztó-összegeként</a> sem áll elő.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p><p>A legkisebb olyan természetes szám, amely öt egymástól különböző <a href="/wiki/Pr%C3%ADmsz%C3%A1mok" title="Prímszámok">prímszám</a> összegeként (2+3+5+7+11) állítható elő. </p><p>A 28 a harmadik <a href="/w/index.php?title=Granville-sz%C3%A1m&action=edit&redlink=1" class="new" title="Granville-szám (a lap nem létezik)">Granville-szám</a>. <a href="/wiki/St%C3%B6rmer-sz%C3%A1m" class="mw-redirect" title="Störmer-szám">Störmer-szám</a>. <a href="/w/index.php?title=Keith-sz%C3%A1m&action=edit&redlink=1" class="new" title="Keith-szám (a lap nem létezik)">Keith-szám</a>. </p><p>Másodfajú <a href="/wiki/Leyland-sz%C3%A1m" class="mw-redirect" title="Leyland-szám">Leyland-szám</a>, tehát felírható <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle x^{y}-y^{x}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msup> <mi>x</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>y</mi> </mrow> </msup> <mo>−</mo> <msup> <mi>y</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>x</mi> </mrow> </msup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle x^{y}-y^{x}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/0d5f060bfa267a6986c7b1beb020a01860056810" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:7.552ex; height:2.676ex;" alt="{\displaystyle x^{y}-y^{x}}"></span> alakban. </p><p>A 28 <a href="/wiki/Oszt%C3%B3harmonikus_sz%C3%A1m" class="mw-redirect" title="Osztóharmonikus szám">osztóharmonikus szám</a>, <a href="/wiki/Boldog_sz%C3%A1m" title="Boldog szám">boldog szám</a>, <a href="/wiki/H%C3%A1romsz%C3%B6gsz%C3%A1m" class="mw-redirect" title="Háromszögszám">háromszögszám</a>, <a href="/wiki/Hatsz%C3%B6gsz%C3%A1m" class="mw-redirect" title="Hatszögszám">hatszögszám</a> és <a href="/wiki/K%C3%B6z%C3%A9ppontos_kilencsz%C3%B6gsz%C3%A1m" class="mw-redirect" title="Középpontos kilencszögszám">középpontos kilencszögszám</a>. </p><p>6 <a href="/wiki/Gyufa" title="Gyufa">gyufa</a> segítségével éppen 28 különböző (nem izomorf) <a href="/wiki/Gyufasz%C3%A1lgr%C3%A1f" class="mw-redirect" title="Gyufaszálgráf">gyufaszálgráfot</a> lehet összeállítani (<a rel="nofollow" class="external text" href="//oeis.org/A066951">A066951</a> sorozat az <a href="/wiki/On-Line_Encyclopedia_of_Integer_Sequences" title="On-Line Encyclopedia of Integer Sequences">OEIS</a>-ben). </p><p>A 28-as szám több <a href="/wiki/Pitagoraszi_sz%C3%A1mh%C3%A1rmasok" title="Pitagoraszi számhármasok">pitagoraszi számhármasban</a> szerepel, ilyenek például a (28; 45; 53), (28; 96; 100), (28; 195; 197), valamint a (21; 28; 35) hármasok. </p><p>Az első 28 pozitív egész szám összege (vagyis a 28. <a href="/wiki/H%C3%A1romsz%C3%B6gsz%C3%A1mok" title="Háromszögszámok">háromszögszám</a>) <a href="/wiki/406_(sz%C3%A1m)" title="406 (szám)">406</a>, szorzata (azaz a 28 <a href="/wiki/Faktori%C3%A1lis" title="Faktoriális">faktoriálisa</a>): 28! = 3,04888344611714 · 10<sup>29</sup>. </p><p>A <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle _{8 \choose 2}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi></mi> <mrow class="MJX-TeXAtom-ORD"> <mrow> <mrow class="MJX-TeXAtom-OPEN"> <mo maxsize="1.2em" minsize="1.2em">(</mo> </mrow> <mfrac linethickness="0"> <mn>8</mn> <mn>2</mn> </mfrac> <mrow class="MJX-TeXAtom-CLOSE"> <mo maxsize="1.2em" minsize="1.2em">)</mo> </mrow> </mrow> </mrow> </msub> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle _{8 \choose 2}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/ac90ef1c456b24fdcf2463525d683bef62be540d" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.338ex; width:2.862ex; height:3.343ex;" alt="{\displaystyle _{8 \choose 2}}"></span>, illetve a <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle _{8 \choose 6}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi></mi> <mrow class="MJX-TeXAtom-ORD"> <mrow> <mrow class="MJX-TeXAtom-OPEN"> <mo maxsize="1.2em" minsize="1.2em">(</mo> </mrow> <mfrac linethickness="0"> <mn>8</mn> <mn>6</mn> </mfrac> <mrow class="MJX-TeXAtom-CLOSE"> <mo maxsize="1.2em" minsize="1.2em">)</mo> </mrow> </mrow> </mrow> </msub> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle _{8 \choose 6}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/4c57c97bb10c33be8c43ea5f590f13a85c5eb65c" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.338ex; width:2.862ex; height:3.343ex;" alt="{\displaystyle _{8 \choose 6}}"></span> <a href="/wiki/Binomi%C3%A1lis_egy%C3%BCtthat%C3%B3" title="Binomiális együttható">binomiális együttható</a> értéke 28. </p><p>A 28 négyzete <a href="/wiki/784_(sz%C3%A1m)" title="784 (szám)">784</a>, köbe 21 952, négyzetgyöke 5,29150, köbgyöke 3,03659, reciproka 0,035714. A 28 egység sugarú kör kerülete 175,92919 egység, területe 2463,00864 területegység; a 28 egység sugarú <a href="/wiki/G%C3%B6mb" title="Gömb">gömb</a> térfogata 91 952,32258 térfogategység. </p><p>A 28 helyen az <a href="/wiki/Euler-f%C3%BCggv%C3%A9ny" title="Euler-függvény">Euler-függvény</a> helyettesítési értéke 12, a <a href="/wiki/M%C3%B6bius-f%C3%BCggv%C3%A9ny" title="Möbius-függvény">Möbius-függvényé</a> 0, a <a href="/wiki/Mertens-f%C3%BCggv%C3%A9ny" title="Mertens-függvény">Mertens-függvényé</a> −1. </p> <div class="mw-heading mw-heading2"><h2 id="A_szám_mint_sorszám,_jelzés"><span id="A_sz.C3.A1m_mint_sorsz.C3.A1m.2C_jelz.C3.A9s"></span>A szám mint sorszám, jelzés</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=28_(sz%C3%A1m)&action=edit&section=2" title="Szakasz szerkesztése: A szám mint sorszám, jelzés"><span>szerkesztés</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>A <a href="/wiki/K%C3%A9miai_elemek_peri%C3%B3dusos_rendszere" title="Kémiai elemek periódusos rendszere">periódusos rendszer</a> 28. eleme a <a href="/wiki/Nikkel" title="Nikkel">nikkel</a>. </p> <div class="mw-heading mw-heading2"><h2 id="A_szám_mint_jel,_kód"><span id="A_sz.C3.A1m_mint_jel.2C_k.C3.B3d"></span>A szám mint jel, kód</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=28_(sz%C3%A1m)&action=edit&section=3" title="Szakasz szerkesztése: A szám mint jel, kód"><span>szerkesztés</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>A 28-as szám a neonácik egyik kedvelt száma. A 2-es az angol ábécé 2. betűjére, a B-re, míg a 8-as az angol ábécé 8. betűjére, azaz a H-ra utal. A B betű az angol <i>blood</i> (= vér) szót jelenti, a H pedig az angol <i>honour</i> (= becsület) szó burkolt jelentése. A 28 így a <i>vér és becsület</i> szóösszetételt jelenti. E nevet viseli a <a href="/wiki/Blood_and_Honour" title="Blood and Honour">Blood and Honour</a> neonáci szervezet. </p> <div class="mw-heading mw-heading2"><h2 id="Kulturális_vonatkozások"><span id="Kultur.C3.A1lis_vonatkoz.C3.A1sok"></span>Kulturális vonatkozások</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=28_(sz%C3%A1m)&action=edit&section=4" title="Szakasz szerkesztése: Kulturális vonatkozások"><span>szerkesztés</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/Szil%C3%A1gyi_Gy%C3%B6rgy_(humorista)" title="Szilágyi György (humorista)">Szilágyi György</a> Hanyas vagy? című művében a „huszonnyolcasokról”, vagyis az 1928-ban születettekről van szó. </p> <div class="mw-heading mw-heading2"><h2 id="Jegyzetek">Jegyzetek</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=28_(sz%C3%A1m)&action=edit&section=5" title="Szakasz szerkesztése: Jegyzetek"><span>szerkesztés</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="ref-1col"><div style="-moz-column-count:2; -webkit-column-count:2; column-count:2; -webkit-column-gap: 3em; -moz-column-gap: 3em; column-gap: 3em;"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">↑</a></span> <span class="reference-text"><a rel="nofollow" class="external free" href="https://oeis.org/A048138/b048138.txt">https://oeis.org/A048138/b048138.txt</a></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><a href="#cite_ref-2">↑</a></span> <span class="reference-text"><a rel="nofollow" class="external free" href="http://oeis.org/A001065/b001065.txt">http://oeis.org/A001065/b001065.txt</a></span> </li> </ol></div></div><div class="ref-1col"><div style="-moz-column-count:2; -webkit-column-count:2; column-count:2; -webkit-column-gap: 3em; -moz-column-gap: 3em; column-gap: 3em;"></div></div> <div 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transparent;border:none;box-shadow:none;padding:0;">m</span></a></li> <li class="nv-talk"><a class="external text" href="https://hu.wikipedia.org/wiki/Sablonvita:H%C3%A1romsz%C3%B6gsz%C3%A1mok"><span title="A sablon vitalapja" style=";;background:none transparent;border:none;box-shadow:none;padding:0;">v</span></a></li> <li class="nv-edit"><a class="external text" href="https://hu.wikipedia.org/w/index.php?title=Sablon:H%C3%A1romsz%C3%B6gsz%C3%A1mok&action=edit"><span title="A sablon szerkesztése" style=";;background:none transparent;border:none;box-shadow:none;padding:0;">sz</span></a></li></ul></div><div id="Háromszögszámok" style="font-size:114%;margin:0 4em"><a href="/wiki/H%C3%A1romsz%C3%B6gsz%C3%A1mok" title="Háromszögszámok">Háromszögszámok</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"><a href="/wiki/1_(sz%C3%A1m)" title="1 (szám)">1</a>, <a href="/wiki/3_(sz%C3%A1m)" title="3 (szám)">3</a>, <a href="/wiki/6_(sz%C3%A1m)" title="6 (szám)">6</a>, <a href="/wiki/10_(sz%C3%A1m)" title="10 (szám)">10</a>, <a href="/wiki/15_(sz%C3%A1m)" title="15 (szám)">15</a>, <a href="/wiki/21_(sz%C3%A1m)" title="21 (szám)">21</a>, <a class="mw-selflink selflink">28</a>, <a href="/wiki/36_(sz%C3%A1m)" title="36 (szám)">36</a>, <a href="/wiki/45_(sz%C3%A1m)" title="45 (szám)">45</a>, <a href="/wiki/55_(sz%C3%A1m)" title="55 (szám)">55</a>, <a href="/wiki/66_(sz%C3%A1m)" title="66 (szám)">66</a>, <a href="/wiki/78_(sz%C3%A1m)" title="78 (szám)">78</a>, <a href="/wiki/91_(sz%C3%A1m)" title="91 (szám)">91</a>, <a href="/wiki/105_(sz%C3%A1m)" title="105 (szám)">105</a>, <a href="/wiki/120_(sz%C3%A1m)" title="120 (szám)">120</a>, <a href="/wiki/136_(sz%C3%A1m)" title="136 (szám)">136</a>, <a href="/wiki/153_(sz%C3%A1m)" title="153 (szám)">153</a>, <a href="/wiki/171_(sz%C3%A1m)" title="171 (szám)">171</a>, <a href="/wiki/190_(sz%C3%A1m)" title="190 (szám)">190</a>, <a href="/wiki/210_(sz%C3%A1m)" title="210 (szám)">210</a>, <a href="/wiki/231_(sz%C3%A1m)" title="231 (szám)">231</a>, <a href="/wiki/253_(sz%C3%A1m)" title="253 (szám)">253</a>, <a href="/wiki/276_(sz%C3%A1m)" title="276 (szám)">276</a>, <a href="/wiki/300_(sz%C3%A1m)" title="300 (szám)">300</a>, <a href="/wiki/325_(sz%C3%A1m)" title="325 (szám)">325</a>, <a href="/wiki/351_(sz%C3%A1m)" title="351 (szám)">351</a>, <a href="/wiki/378_(sz%C3%A1m)" title="378 (szám)">378</a>, <a href="/wiki/406_(sz%C3%A1m)" title="406 (szám)">406</a>, <a href="/wiki/435_(sz%C3%A1m)" title="435 (szám)">435</a>, <a href="/wiki/465_(sz%C3%A1m)" title="465 (szám)">465</a>, <a href="/wiki/496_(sz%C3%A1m)" title="496 (szám)">496</a>, <a href="/wiki/528_(sz%C3%A1m)" title="528 (szám)">528</a>, <a href="/wiki/561_(sz%C3%A1m)" title="561 (szám)">561</a>, <a href="/wiki/595_(sz%C3%A1m)" title="595 (szám)">595</a>, <a href="/wiki/630_(sz%C3%A1m)" title="630 (szám)">630</a>, <a href="/wiki/666_(sz%C3%A1m)" title="666 (szám)">666</a>, <a href="/wiki/703_(sz%C3%A1m)" title="703 (szám)">703</a>, <a href="/wiki/741_(sz%C3%A1m)" title="741 (szám)">741</a>, <a href="/wiki/780_(sz%C3%A1m)" title="780 (szám)">780</a>, <a href="/wiki/820_(sz%C3%A1m)" title="820 (szám)">820</a>, <a href="/wiki/861_(sz%C3%A1m)" title="861 (szám)">861</a>, <a href="/wiki/903_(sz%C3%A1m)" title="903 (szám)">903</a>, <a href="/wiki/946_(sz%C3%A1m)" title="946 (szám)">946</a>, <a href="/wiki/990_(sz%C3%A1m)" title="990 (szám)">990</a>,… <span style="font-weight:bold;"> ·</span>  <a href="/wiki/Soksz%C3%B6gsz%C3%A1mok_list%C3%A1ja" title="Sokszögszámok listája">sokszögszámok listája</a></div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r26593303"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r26641489"></div><div role="navigation" class="navbox" aria-labelledby="Tökéletes_számok" style="padding:3px"><table class="nowraplinks mw-collapsible 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transparent;border:none;box-shadow:none;padding:0;">v</span></a></li> <li class="nv-edit"><a class="external text" href="https://hu.wikipedia.org/w/index.php?title=Sablon:T%C3%B6k%C3%A9letes_sz%C3%A1mok&action=edit"><span title="A sablon szerkesztése" style=";;background:none transparent;border:none;box-shadow:none;padding:0;">sz</span></a></li></ul></div><div id="Tökéletes_számok" style="font-size:114%;margin:0 4em"><a href="/wiki/T%C3%B6k%C3%A9letes_sz%C3%A1mok" title="Tökéletes számok">Tökéletes számok</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"><a href="/wiki/6_(sz%C3%A1m)" title="6 (szám)">6</a>, <a class="mw-selflink selflink">28</a>, <a href="/wiki/496_(sz%C3%A1m)" title="496 (szám)">496</a>, <a href="/wiki/8128_(sz%C3%A1m)" title="8128 (szám)">8128</a>, 33 550 336, 8 589 869 056, 137 438 691 328, 2 305 843 008 139 952 128,…</div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r26593303"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r26641489"></div><div role="navigation" class="navbox" aria-labelledby="Pascal-háromszög_–_binomiális_együtthatók" style="padding:3px"><table class="nowraplinks mw-collapsible mw-autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div class="navbar noprint hlist plainlinks mini" style=";;background:none transparent;border:none;box-shadow:none;padding:0;;font-size:xx-small"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r26593303"><span style="display:none"><a href="/wiki/Sablon:Pascal-h%C3%A1romsz%C3%B6g" title="Sablon:Pascal-háromszög">Sablon:Pascal-háromszög</a></span><ul style="display:inline"><li class="nv-view"><a class="external text" href="https://hu.wikipedia.org/wiki/Sablon:Pascal-h%C3%A1romsz%C3%B6g"><span title="Mutasd ezt a sablont" style=";;background:none transparent;border:none;box-shadow:none;padding:0;">m</span></a></li> <li class="nv-talk"><a class="external text" href="https://hu.wikipedia.org/wiki/Sablonvita:Pascal-h%C3%A1romsz%C3%B6g"><span title="A sablon vitalapja" style=";;background:none transparent;border:none;box-shadow:none;padding:0;">v</span></a></li> <li class="nv-edit"><a class="external text" href="https://hu.wikipedia.org/w/index.php?title=Sablon:Pascal-h%C3%A1romsz%C3%B6g&action=edit"><span title="A sablon szerkesztése" style=";;background:none transparent;border:none;box-shadow:none;padding:0;">sz</span></a></li></ul></div><div id="Pascal-háromszög_–_binomiális_együtthatók" style="font-size:114%;margin:0 4em"><a href="/wiki/Pascal-h%C3%A1romsz%C3%B6g" title="Pascal-háromszög">Pascal-háromszög</a> – <a href="/wiki/Binomi%C3%A1lis_egy%C3%BCtthat%C3%B3" title="Binomiális együttható">binomiális együtthatók</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"><center> <p>1<br /> 1<span style="font-weight:bold;"> ·</span> 1<br /> 1<span style="font-weight:bold;"> ·</span> 2<span style="font-weight:bold;"> ·</span> 1<br /> 1<span style="font-weight:bold;"> ·</span> 3<span style="font-weight:bold;"> ·</span> 3<span style="font-weight:bold;"> ·</span> 1<br /> 1<span style="font-weight:bold;"> ·</span> 4<span style="font-weight:bold;"> ·</span> <a href="/wiki/6_(sz%C3%A1m)" title="6 (szám)">6</a><span style="font-weight:bold;"> ·</span> 4<span style="font-weight:bold;"> ·</span> 1<br /> 1<span style="font-weight:bold;"> ·</span> 5<span style="font-weight:bold;"> ·</span> <a href="/wiki/10_(sz%C3%A1m)" title="10 (szám)">10</a><span style="font-weight:bold;"> ·</span> 10<span style="font-weight:bold;"> ·</span> 5<span style="font-weight:bold;"> ·</span> 1 <br /> 1<span style="font-weight:bold;"> ·</span> 6<span style="font-weight:bold;"> ·</span> <a href="/wiki/15_(sz%C3%A1m)" title="15 (szám)">15</a><span style="font-weight:bold;"> ·</span> <a href="/wiki/20_(sz%C3%A1m)" title="20 (szám)">20</a><span style="font-weight:bold;"> ·</span> 15<span style="font-weight:bold;"> ·</span> 6<span style="font-weight:bold;"> ·</span> 1<br /> 1<span style="font-weight:bold;"> ·</span> 7<span style="font-weight:bold;"> ·</span> <a href="/wiki/21_(sz%C3%A1m)" title="21 (szám)">21</a><span style="font-weight:bold;"> ·</span> <a href="/wiki/35_(sz%C3%A1m)" title="35 (szám)">35</a><span style="font-weight:bold;"> ·</span> 35<span style="font-weight:bold;"> ·</span> 21<span style="font-weight:bold;"> ·</span> 7<span style="font-weight:bold;"> ·</span> 1<br /> 1<span style="font-weight:bold;"> ·</span> 8<span style="font-weight:bold;"> ·</span> <a class="mw-selflink selflink">28</a><span style="font-weight:bold;"> ·</span> <a href="/wiki/56_(sz%C3%A1m)" title="56 (szám)">56</a><span style="font-weight:bold;"> ·</span> <a href="/wiki/70_(sz%C3%A1m)" title="70 (szám)">70</a><span style="font-weight:bold;"> ·</span> 56<span style="font-weight:bold;"> ·</span> 28<span style="font-weight:bold;"> ·</span> 8<span style="font-weight:bold;"> ·</span> 1<br /> 1<span style="font-weight:bold;"> ·</span> 9<span style="font-weight:bold;"> ·</span> <a href="/wiki/36_(sz%C3%A1m)" title="36 (szám)">36</a><span style="font-weight:bold;"> ·</span> <a href="/wiki/84_(sz%C3%A1m)" title="84 (szám)">84</a><span style="font-weight:bold;"> ·</span> <a href="/wiki/126_(sz%C3%A1m)" title="126 (szám)">126</a><span style="font-weight:bold;"> ·</span> 126<span style="font-weight:bold;"> ·</span> 84<span style="font-weight:bold;"> ·</span> 36<span style="font-weight:bold;"> ·</span> 9<span style="font-weight:bold;"> ·</span> 1<br /> 1<span style="font-weight:bold;"> ·</span> 10<span style="font-weight:bold;"> ·</span> <a href="/wiki/45_(sz%C3%A1m)" title="45 (szám)">45</a><span style="font-weight:bold;"> ·</span> <a href="/wiki/120_(sz%C3%A1m)" title="120 (szám)">120</a><span style="font-weight:bold;"> ·</span> <a href="/wiki/210_(sz%C3%A1m)" title="210 (szám)">210</a><span style="font-weight:bold;"> ·</span> <a href="/wiki/252_(sz%C3%A1m)" title="252 (szám)">252</a><span style="font-weight:bold;"> ·</span> 210<span style="font-weight:bold;"> ·</span> 120<span style="font-weight:bold;"> ·</span> 45<span style="font-weight:bold;"> ·</span> 10<span style="font-weight:bold;"> ·</span> 1<br /> 1<span style="font-weight:bold;"> ·</span> 11<span style="font-weight:bold;"> ·</span> <a href="/wiki/55_(sz%C3%A1m)" title="55 (szám)">55</a><span style="font-weight:bold;"> ·</span> <a href="/wiki/165_(sz%C3%A1m)" title="165 (szám)">165</a><span style="font-weight:bold;"> ·</span> <a href="/wiki/330_(sz%C3%A1m)" title="330 (szám)">330</a><span style="font-weight:bold;"> ·</span> <a href="/wiki/462_(sz%C3%A1m)" title="462 (szám)">462</a><span style="font-weight:bold;"> ·</span> 462<span style="font-weight:bold;"> ·</span> 330<span style="font-weight:bold;"> ·</span> 165<span style="font-weight:bold;"> ·</span> 55<span style="font-weight:bold;"> ·</span> 11<span style="font-weight:bold;"> ·</span> 1<br /> 1<span style="font-weight:bold;"> ·</span> 12<span style="font-weight:bold;"> ·</span> <a href="/wiki/66_(sz%C3%A1m)" title="66 (szám)">66</a><span style="font-weight:bold;"> ·</span> <a href="/wiki/220_(sz%C3%A1m)" title="220 (szám)">220</a><span style="font-weight:bold;"> ·</span> <a href="/wiki/495_(sz%C3%A1m)" title="495 (szám)">495</a><span style="font-weight:bold;"> ·</span> <a href="/wiki/792_(sz%C3%A1m)" title="792 (szám)">792</a><span style="font-weight:bold;"> ·</span> <a href="/wiki/924_(sz%C3%A1m)" title="924 (szám)">924</a><span style="font-weight:bold;"> ·</span> 792<span style="font-weight:bold;"> ·</span> 495<span style="font-weight:bold;"> ·</span> 220<span style="font-weight:bold;"> ·</span> 66<span style="font-weight:bold;"> ·</span> 12<span style="font-weight:bold;"> ·</span> 1<br /> 1<span style="font-weight:bold;"> ·</span> 13<span style="font-weight:bold;"> ·</span> <a href="/wiki/78_(sz%C3%A1m)" title="78 (szám)">78</a><span style="font-weight:bold;"> ·</span> <a href="/wiki/286_(sz%C3%A1m)" title="286 (szám)">286</a><span style="font-weight:bold;"> ·</span> <a href="/wiki/715_(sz%C3%A1m)" title="715 (szám)">715</a><span style="font-weight:bold;"> ·</span> 1287<span style="font-weight:bold;"> ·</span> 1716<span style="font-weight:bold;"> ·</span> 1716<span style="font-weight:bold;"> ·</span> 1287<span style="font-weight:bold;"> ·</span> 715<span style="font-weight:bold;"> ·</span> 286<span style="font-weight:bold;"> ·</span> 78<span style="font-weight:bold;"> ·</span> 13<span style="font-weight:bold;"> ·</span> 1<br /> 1<span style="font-weight:bold;"> ·</span> 14<span style="font-weight:bold;"> ·</span> <a href="/wiki/91_(sz%C3%A1m)" title="91 (szám)">91</a><span style="font-weight:bold;"> ·</span> <a href="/wiki/364_(sz%C3%A1m)" title="364 (szám)">364</a><span style="font-weight:bold;"> ·</span> <a href="/wiki/1001_(sz%C3%A1m)" title="1001 (szám)">1001</a><span style="font-weight:bold;"> ·</span> 2002<span style="font-weight:bold;"> ·</span> 3003<span style="font-weight:bold;"> ·</span> 3432<span style="font-weight:bold;"> ·</span> 3003<span style="font-weight:bold;"> ·</span> 2002<span style="font-weight:bold;"> ·</span> 1001<span style="font-weight:bold;"> ·</span> 364<span style="font-weight:bold;"> ·</span> 91<span style="font-weight:bold;"> ·</span> 14<span style="font-weight:bold;"> ·</span> 1<br /> 1<span style="font-weight:bold;"> ·</span> 15<span style="font-weight:bold;"> ·</span> <a href="/wiki/105_(sz%C3%A1m)" title="105 (szám)">105</a><span style="font-weight:bold;"> ·</span> <a href="/wiki/455_(sz%C3%A1m)" title="455 (szám)">455</a><span style="font-weight:bold;"> ·</span> 1365<span style="font-weight:bold;"> ·</span> 3003<span style="font-weight:bold;"> ·</span> 5005<span style="font-weight:bold;"> ·</span> 6435<span style="font-weight:bold;"> ·</span> 6435<span style="font-weight:bold;"> ·</span> 5005<span style="font-weight:bold;"> ·</span> 3003<span style="font-weight:bold;"> ·</span> 1365<span style="font-weight:bold;"> ·</span> 455<span style="font-weight:bold;"> ·</span> 105<span style="font-weight:bold;"> ·</span> 15<span style="font-weight:bold;"> ·</span> 1 </p> </center></div></td></tr><tr><td colspan="2" class="navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"><a href="/wiki/Binomi%C3%A1lis_egy%C3%BCtthat%C3%B3k_list%C3%A1ja" title="Binomiális együtthatók listája">binomiális együtthatók listája</a></div></td></tr></tbody></table></div> <div class="noprint noviewer" style="overflow: hidden; clear: both;"><div style="margin-left:0; margin-right:2px;"><ul style="display:block; list-style-image:none; list-style-type:none; width:100%; vertical-align:middle; margin:0; padding:0; min-height: 27px;"><li style="float:left; min-height: 27px; line-height:25px; width:100%; margin:0; margin-top:.5em; 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