170 (number)

From Wikipedia, the free encyclopedia

170 is the natural number following 169 and preceding 171.


List of numbers — Integers

<< 170 171 172 173 174 175 176 177 178 179 >>
Cardinal One hundred [and]
seventy
Ordinal 170th
Factorization 2 \cdot 5 \cdot 17
Divisors 1, 2, 5, 10, 17, 34, 85, 170
Roman numeral CLXX
Binary 10101010
Hexadecimal AA

[edit] In mathematics

One hundred [and] seventy is a sphenic number. It is the smallest n for which φ(n) and σ(n) are both square. 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. 170 is a repdigit in base 4 (2222).

[edit] In other fields

One hundred [and] seventy is also

  • The year AD 170 or 170 BC.
  • The largest number for which Google's built-in calculator function can compute the factorial.