Back 40 (ахыԥхьаӡара) Abkhazian 40 (عدد) Arabic 40 (ədəd) Azerbaijani ۴۰ (سایی) AZB 40 (angka) BAN 40 (число) Bulgarian ༤༠ (གྲངས་ཀ།) Tibetan Quaranta Catalan 40 CDO 40 (numero) CEB

40 (number)

← 39 40 41 →
Cardinalforty
Ordinal40th
(fortieth)
Numeral systemquadragesimal
Factorization23 × 5
Divisors1, 2, 4, 5, 8, 10, 20, 40
Greek numeralΜ´
Roman numeralXL
Latin prefixquadrage-
Binary1010002
Ternary11113
Senary1046
Octal508
Duodecimal3412
Hexadecimal2816
Armenian Խ
Hebrewמ / ם
Babylonian numeral𒐏
Egyptian hieroglyph𓎉

40 (forty) is the natural number following 39 and preceding 41.

Though the word is related to four (4), the spelling forty replaced fourty during the 17th century[1][2] and is now the standard form.

  1. ^ Google nGrams
  2. ^ Oxford English Dictionary, 1st edition, s.v.

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