57428115 has 32 divisors (see below), whose sum is σ = 93864960. Its totient is φ = 29976576.

The previous prime is 57428113. The next prime is 57428123. The reversal of 57428115 is 51182475.

It is not a de Polignac number, because 57428115 - 2¹ = 57428113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57428113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 240166 + ... + 240404.

It is an arithmetic number, because the mean of its divisors is an integer number (2933280).

Almost surely, 2^57428115 is an apocalyptic number.

57428115 is a deficient number, since it is larger than the sum of its proper divisors (36436845).

57428115 is a wasteful number, since it uses less digits than its factorization.

57428115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523.

The product of its digits is 11200, while the sum is 33.

The square root of 57428115 is about 7578.1340051493. The cubic root of 57428115 is about 385.8112202972.

The spelling of 57428115 in words is "fifty-seven million, four hundred twenty-eight thousand, one hundred fifteen".