57015428 has 12 divisors (see below), whose sum is σ = 105028560. Its totient is φ = 27007272.

The previous prime is 57015407. The next prime is 57015443. The reversal of 57015428 is 82451075.

57015428 = 972² + 973² + ... + 1028².

It is a junction number, because it is equal to n+sod(n) for n = 57015394 and 57015403.

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, 375026 + ... + 375177.

It is an arithmetic number, because the mean of its divisors is an integer number (8752380).

Almost surely, 2^57015428 is an apocalyptic number.

It is an amenable number.

57015428 is a deficient number, since it is larger than the sum of its proper divisors (48013132).

57015428 is a wasteful number, since it uses less digits than its factorization.

57015428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750226 (or 750224 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 57015428 is about 7550.8561104023. The cubic root of 57015428 is about 384.8848320279.

The spelling of 57015428 in words is "fifty-seven million, fifteen thousand, four hundred twenty-eight".