90 (number)

← 89 90 91 →
Cardinalninety
Ordinal90th
(ninetieth)
Factorization2 × 32 × 5
Divisors1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90
Greek numeralϞ´
Roman numeralXC
Binary10110102
Ternary101003
Senary2306
Octal1328
Duodecimal7612
Hexadecimal5A16
ArmenianՂ
Hebrewצ / ץ
Babylonian numeral𒐕𒌍
Egyptian hieroglyph𓎎

90 (ninety) is the natural number following 89 and preceding 91.

In the English language, the numbers 90 and 19 are often confused, as they sound very similar. When carefully enunciated, they differ in which syllable is stressed: 19 /naɪnˈtiːn/ vs 90 /ˈnaɪnti/. However, in dates such as 1999, and when contrasting numbers in the teens and when counting, such as 17, 18, 19, the stress shifts to the first syllable: 19 /ˈnaɪntiːn/.