57012428 has 12 divisors (see below), whose sum is σ = 108841992. Its totient is φ = 25914720.

The previous prime is 57012419. The next prime is 57012443. The reversal of 57012428 is 82421075.

It is a self number, because there is not a number n which added to its sum of digits gives 57012428.

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, 647825 + ... + 647912.

It is an arithmetic number, because the mean of its divisors is an integer number (9070166).

Almost surely, 2^57012428 is an apocalyptic number.

It is an amenable number.

57012428 is a deficient number, since it is larger than the sum of its proper divisors (51829564).

57012428 is a wasteful number, since it uses less digits than its factorization.

57012428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295752 (or 1295750 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 57012428 is about 7550.6574548181. The cubic root of 57012428 is about 384.8780813712.

The spelling of 57012428 in words is "fifty-seven million, twelve thousand, four hundred twenty-eight".