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	<math>2^2 \cdot 3^2 \cdot 5<math>
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)

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

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183 = 3 61

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

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185, see 185 (number)

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186 = 2 3 31, sphenic number, nontotient

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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), self number

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188 = 2^2 47, nontotient, untouchable number

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189 = 3^3 7, centered cube number

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