90 (number)

← 89 90 91 →
← 90 91 92 93 94 95 96 97 98 99 → List of numbers; Integers; ← 0 10 20 30 40 50 60 70 80 90 →
Cardinal	ninety
Ordinal	90th; (ninetieth)
Factorization	2 × 32 × 5
Divisors	1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90
Greek numeral	Ϟ´
Roman numeral	XC
Binary	10110102
Ternary	101003
Senary	2306
Octal	1328
Duodecimal	7612
Hexadecimal	5A16
Armenian	Ղ
Hebrew	צ / ץ
Babylonian numeral	𒐕𒌍
Egyptian hieroglyph	𓎎

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/.