57056388 has 24 divisors (see below), whose sum is σ = 133267008. Its totient is φ = 18999456.

The previous prime is 57056383. The next prime is 57056423. The reversal of 57056388 is 88365075.

It is not an unprimeable number, because it can be changed into a prime (57056383) 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, 14745 + ... + 18207.

It is an arithmetic number, because the mean of its divisors is an integer number (5552792).

Almost surely, 2^57056388 is an apocalyptic number.

It is an amenable number.

57056388 is an abundant number, since it is smaller than the sum of its proper divisors (76210620).

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

57056388 is a wasteful number, since it uses less digits than its factorization.

57056388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4843 (or 4841 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

The square root of 57056388 is about 7553.5678986821. The cubic root of 57056388 is about 384.9769773156.

The spelling of 57056388 in words is "fifty-seven million, fifty-six thousand, three hundred eighty-eight".