172664904 has 32 divisors (see below), whose sum is σ = 435489120. Its totient is φ = 57044736.

The previous prime is 172664893. The next prime is 172664911. The reversal of 172664904 is 409466271.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29122 + ... + 34545.

It is an arithmetic number, because the mean of its divisors is an integer number (13609035).

Almost surely, 2^172664904 is an apocalyptic number.

It is an amenable number.

172664904 is an abundant number, since it is smaller than the sum of its proper divisors (262824216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172664904 is a wasteful number, since it uses less digits than its factorization.

172664904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63789 (or 63785 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 172664904 is about 13140.2018249340. The cubic root of 172664904 is about 556.8454693925.

The spelling of 172664904 in words is "one hundred seventy-two million, six hundred sixty-four thousand, nine hundred four".