57172387 has 8 divisors (see below), whose sum is σ = 60366800. Its totient is φ = 53996544.

The previous prime is 57172331. The next prime is 57172391. The reversal of 57172387 is 78327175.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57172387 - 2¹⁵ = 57139619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57172307) 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, 1939 + ... + 10867.

It is an arithmetic number, because the mean of its divisors is an integer number (7545850).

Almost surely, 2^57172387 is an apocalyptic number.

57172387 is a deficient number, since it is larger than the sum of its proper divisors (3194413).

57172387 is a wasteful number, since it uses less digits than its factorization.

57172387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9285.

The product of its digits is 82320, while the sum is 40.

The square root of 57172387 is about 7561.2424243639. The cubic root of 57172387 is about 385.2376943401.

The spelling of 57172387 in words is "fifty-seven million, one hundred seventy-two thousand, three hundred eighty-seven".