180 (number)

180 is the natural number following one hundred seventy-nine and preceding one hundred eighty-one.

List of numbers — Integers
<< 100 110 120 130 140 150 160 170 180 190 >>

Ordinal One hundred [and]
eighty
Cardinal 180th
Factorization
Roman numeral CLXXX
Binary 10110100
Hexadecimal B4

One hundred eighty is the sum of six consecutive primes (19 + 23 + 29 + 31 + 37 + 41), as well as the sum of eight consecutive primes (11 + 13 + 17 + 19 + 23 + 29 + 31 + 37). 180 is a Harshad number.

In normal space, the interior angles of a triangle add up to 180 degrees.

One hundred eighty is also

Interstate 180, the designation of some spur routes of Interstate 80.
The year AD 180 or 180 BC.
The maximum possible score in one turn at darts.

Other numbers in the 180s

181 = prime number, palindromic prime, star number, centered square number, centered pentagonal number, sum of five consecutive primes (29 + 31 + 37 + 41 + 43)

182 = 2 7 13, sphenic number, pronic number, nontotient

183 = 3 61

184 = 2^3 23, sum of four consecutive primes (41 + 43 + 47 + 53)

185 = 5 37

186 = 2 3 31, sphenic number, nontotient

187 = 11 17, sum of three consecutive primes (59 + 61 + 67), sum of nine consecutive primes (7 + 11 + 13 + 17 + 19 + 23 + 29 + 31 + 37)

188 = 2^2 47, nontotient

189 = 3^3 7