| Nominal | 21428 |
| Cardinal | twenty-one thousand four hundred twenty-eight |
Cardinal twenty-one thousand four hundred twenty-eight | |
| Ordinal | 21,428th |
| Number of digits | 5 |
| Sum of digits | 17 |
| Product of digits | 128 |
| Number parity | Even |
| Prime factorization | 2 x 2 x 11 x 487 |
| Prime factorization in exponent form | 22 x 11 x 487 |
| Prime factors | 2, 11, 487 |
| Number of distinct prime factors ω(n) | 3 |
| Total number of prime factors Ω(n) | 4 |
| Sum of prime factors | 500 |
| Product of prime factors | 10714 |
| Is 21428 a prime number? | No |
| Is 21428 a semiprime number? | No |
| Is 21428 a Chen prime number? | No |
| Is 21428 a Mersenne prime number? | No |
| Is 21428 a Catalan number? | No |
| Is 21428 a Fibonacci number? | No |
| Is 21428 a Idoneal number? | No |
| Square of 21428 (n2) | 459159184 |
| Cube of 21428 (n3) | 9838862994752 |
| Square root of 21428 | 146.38305912912 |
| Natural Logarithm (ln) of 21428 | 9.9724537570009 |
| Decimal Logarithm (log) of 21428 | 4.3309816377008 |
| Sine of 21428 | 0.71978331804606 |
| Cosecant of 21428 | 1.3893069968815 |
| Cosine of 21428 | -0.69419880082193 |
| Secant of 21428 | -1.440509546856 |
| Tangent of 21428 | -1.0368547413131 |
| Cotangent of 21428 | -0.96445525120868 |
| The spelling of 21428 in words is "twenty-one thousand four hundred twenty-eight", meaning that: |
| 21428 is not an aban number (as it contains the letter a) |
| 21428 is not an eban number (as it contains the letter e) |
| 21428 is not an iban number (as it contains the letter i) |
| 21428 is not an oban number (as it contains the letter o) |
| 21428 is not a tban number (as it contains the letter t) |
| 21428 is not an uban number (as it contains the letter u) |
| Bengali numerals | ২১৪২৮ |
| Eastern Arabic numerals | ٢١٬٤٢٨ |
| Hieroglyphs numeralsused in Ancient Egypt | 𓂭𓂭𓆼𓍥𓎇𓐁 |
| Khmer numerals | ២១៤២៨ |
| Japanese numerals | 二万千四百二十八 |
| Roman numerals | n/a |
| Thai numerals | ๒๑๔๒๘ |
| Arabic | واحد و عشرون ألف و أربعة مائة و ثمانية و عشرون |
| Croatian | dvadeset i jedna tisuća četiristo dvadeset i osam |
| Czech | dvacet jedna tisíc čtyři sta dvacet osm |
| Danish | en og tyve tusinde fire hundrede otte og tyve |
| Dutch | éénentwintigduizend vierhonderdachtentwintig |
| Estonian | akpe blaeve vɔ ɖekɛ alafa ene blaeve vɔ enyi |
| Faroese | tjúgoeitt tusin og fýrehundraðogtjúgoátta |
| Filipino | dalawáng pû’t isáng libó’t ápat na daán at dalawáng pû’t waló |
| Finnish | kaksikymmentäyksituhattaneljäsataakaksikymmentäkahdeksan |
| French | vingt et un mille quatre cent vingt-huit |
| Greek | είκοσι μία χίλιάδες τετρακόσια είκοσι οκτώ |
| German | einundzwanzigtausendvierhundertachtundzwanzig |
| Hebrew | עשרים ואחד אלף ארבע מאות עשרים ושמונה |
| Hindi | इक्कीस हज़ार चार सौ अट्ठाईस |
| Hungarian | huszonegyezernégyszázhuszonnyolc |
| Icelandic | tuttugu og eitt þúsund og fjögurhundrað og tuttugu og átta |
| Indonesian | dua puluh satu ribu empat ratus dua puluh delapan |
| Italian | ventunomilaquattrocentoventotto |
| Japanese | 二万千四百二十八 |
| Korean | 이만 천사백이십팔 |
| Latvian | divdesmit viens tūkstoši četrsimt divdesmit astoņi |
| Lithuanian | dvidešimt vienas tūkstantis keturi šimtai dvidešimt aštuoni |
| Norwegian | tjueett tusen fire hundre og tjueåtte |
| Persian | بیست و یک هزار و چهارصد و بیست و هشت |
| Polish | dwadzieścia jeden tysięcy czterysta dwadzieścia osiem |
| Portuguese | vinte e um mil quatrocentos e vinte e oito |
| Romanian | douăzeci şi una mii patru sute douăzeci şi opt |
| Russian | двадцать одна тысяча четыреста двадцать восемь |
| Serbian | двадесет и једна хиљада четиристо двадесет и осам |
| Slovak | dvadsaťjedna tisíc štyristo dvadsaťosem |
| Slovene | dvaset ena tisuću štiristo dvaset osem |
| Spanish | veintiún mil cuatrocientos veintiocho |
| Swahili | elfu ishirini na moja, mia nne na ishirini na nane |
| Swedish | tjugoentusenfyrahundratjugoåtta |
| Thai | สองหมื่นหนึ่งพันสี่ร้อยยี่สิบแปด |
| Turkish | yirmi bir bin dört yüz yirmi sekiz |
| Ukrainian | двадцять одна тисяча чотириста двадцять вісім |
| Vietnamese | hai mươi mốt nghìn bốn trăm hai mươi tám |
| Number 21428 reversed | 82412 | |
| Unicode Character | U+53B4 | 厴 |
| Unix Timestamp | Thu, 01 Jan 1970 05:57:08 +0000 | |