172864624 has 10 divisors (see below), whose sum is σ = 334925240. Its totient is φ = 86432304.

The previous prime is 172864609. The next prime is 172864633. The reversal of 172864624 is 426468271.

It is a happy number.

It is a super-2 number, since 2×172864624² = 59764356461322752, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5402004 + ... + 5402035.

It is an arithmetic number, because the mean of its divisors is an integer number (33492524).

Almost surely, 2^172864624 is an apocalyptic number.

It is an amenable number.

172864624 is a deficient number, since it is larger than the sum of its proper divisors (162060616).

172864624 is a wasteful number, since it uses less digits than its factorization.

172864624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10804047 (or 10804041 counting only the distinct ones).

The product of its digits is 129024, while the sum is 40.

The square root of 172864624 is about 13147.7992074719. The cubic root of 172864624 is about 557.0600861103.

The spelling of 172864624 in words is "one hundred seventy-two million, eight hundred sixty-four thousand, six hundred twenty-four".