172904388 has 24 divisors (see below), whose sum is σ = 405259008. Its totient is φ = 57375456.

The previous prime is 172904387. The next prime is 172904393. The reversal of 172904388 is 883409271.

172904388 is nontrivially palindromic in base 11.

172904388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (172904387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29631 + ... + 34982.

It is an arithmetic number, because the mean of its divisors is an integer number (16885792).

Almost surely, 2^172904388 is an apocalyptic number.

It is an amenable number.

172904388 is an abundant number, since it is smaller than the sum of its proper divisors (232354620).

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

172904388 is a wasteful number, since it uses less digits than its factorization.

172904388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64843 (or 64841 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 172904388 is about 13149.3113127646. The cubic root of 172904388 is about 557.1027962930.

The spelling of 172904388 in words is "one hundred seventy-two million, nine hundred four thousand, three hundred eighty-eight".