170 (number)
170 is the natural number following 169 and preceding 171.
| Template:Numbers 170s | |
| Cardinal | One hundred [and] seventy |
| Ordinal | 170th |
| Factorization | |
| Divisors | 1, 2, 5, 10, 17, 34, 85, 170 |
| Roman numeral | CLXX |
| Binary | 10101010 |
| Hexadecimal | AA |
In mathematics
170 is the smallest n for which φ(n) and σ(n) are both square(64 and 324 respectively). But 170 is never a solution for φ(x), making it a nontotient. Nor is it ever a solution to x - φ(x), making it a noncototient.
The proper divisors of 170 are 1, 2, 5, 10, 17, 34, and 85. These add up to 154, which is less than 170, and thus 170 is a deficient number.
Written as 2222 in base 4, 170 is a repdigit.
170 is the largest integer for which Google's built-in calculator function can compute the factorial, returning the answer as 170! = 7.25741562 × 10306.
In sports
- 170 is the maximum check-out possible in a standard game of darts (where the final score must be a double).[citation needed] It consists of two treble-twenties and a double-bullseye.
See also
- 170s
- E170
- F170
- List of highways numbered 170
- United States Supreme Court cases, Volume 170
- Bowers v. Kerbaugh-Empire Co., 271 U.S. 170 (1926)
- Police v. City of Newark, 170 F.3d 359 (3d Cir. 1999)
- United Nations Security Council Resolution 170
- Pennsylvania House of Representatives, District 170
- 1700 AM radio stations
- 170th meridian west and 170th meridian east