172208 has 20 divisors (see below), whose sum is σ = 342240. Its totient is φ = 83904.

The previous prime is 172199. The next prime is 172213. The reversal of 172208 is 802271.

It is a self number, because there is not a number n which added to its sum of digits gives 172208.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 172208.

It is an unprimeable number.

172208 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 638 + ... + 866.

It is an arithmetic number, because the mean of its divisors is an integer number (17112).

2¹⁷²²⁰⁸ is an apocalyptic number.

It is an amenable number.

172208 is a deficient number, since it is larger than the sum of its proper divisors (170032).

172208 is a wasteful number, since it uses less digits than its factorization.

172208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 172208 is about 414.9795175668. The cubic root of 172208 is about 55.6353862691.

Adding to 172208 its reverse (802271), we get a palindrome (974479).

The spelling of 172208 in words is "one hundred seventy-two thousand, two hundred eight".