57172272 has 20 divisors (see below), whose sum is σ = 147695160. Its totient is φ = 19057408.

The previous prime is 57172261. The next prime is 57172301. The reversal of 57172272 is 27227175.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 595497 + ... + 595592.

It is an arithmetic number, because the mean of its divisors is an integer number (7384758).

Almost surely, 2^57172272 is an apocalyptic number.

It is an amenable number.

57172272 is an abundant number, since it is smaller than the sum of its proper divisors (90522888).

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

57172272 is a wasteful number, since it uses less digits than its factorization.

57172272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1191100 (or 1191094 counting only the distinct ones).

The product of its digits is 13720, while the sum is 33.

The square root of 57172272 is about 7561.2348197897. The cubic root of 57172272 is about 385.2374360431.

The spelling of 57172272 in words is "fifty-seven million, one hundred seventy-two thousand, two hundred seventy-two".