180 is the natural number following one hundred seventy-nine and preceding one hundred eighty-one.
| Template:Numbers 100-200 | |
| 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, sum of five consecutive primes (29 + 31 + 37 + 41 + 43)
182 = 2 7 13, sphenic number
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
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
189 = 3^3 7