172056872 has 24 divisors (see below), whose sum is σ = 349334190. Its totient is φ = 79410240.

The previous prime is 172056823. The next prime is 172056883. The reversal of 172056872 is 278650271.

It can be written as a sum of positive squares in 3 ways, for example, as 119552356 + 52504516 = 10934^2 + 7246^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 62279 + ... + 64982.

Almost surely, 2^172056872 is an apocalyptic number.

It is an amenable number.

172056872 is an abundant number, since it is smaller than the sum of its proper divisors (177277318).

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

172056872 is a wasteful number, since it uses less digits than its factorization.

172056872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127293 (or 127276 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 172056872 is about 13117.0450940751. The cubic root of 172056872 is about 556.1910648834.

The spelling of 172056872 in words is "one hundred seventy-two million, fifty-six thousand, eight hundred seventy-two".