172745864 has 32 divisors (see below), whose sum is σ = 331884000. Its totient is φ = 84266112.

The previous prime is 172745861. The next prime is 172745869. The reversal of 172745864 is 468547271.

It is a super-2 number, since 2×172745864² = 59682267058212992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (172745861) 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, 64292 + ... + 66924.

It is an arithmetic number, because the mean of its divisors is an integer number (10371375).

Almost surely, 2^172745864 is an apocalyptic number.

It is an amenable number.

172745864 is a deficient number, since it is larger than the sum of its proper divisors (159138136).

172745864 is a wasteful number, since it uses less digits than its factorization.

172745864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2837 (or 2833 counting only the distinct ones).

The product of its digits is 376320, while the sum is 44.

The square root of 172745864 is about 13143.2820862979. The cubic root of 172745864 is about 556.9324879737.

The spelling of 172745864 in words is "one hundred seventy-two million, seven hundred forty-five thousand, eight hundred sixty-four".