57428724 has 24 divisors (see below), whose sum is σ = 134211168. Its totient is φ = 19112800.

The previous prime is 57428717. The next prime is 57428759. The reversal of 57428724 is 42782475.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4999 + ... + 11825.

It is an arithmetic number, because the mean of its divisors is an integer number (5592132).

Almost surely, 2^57428724 is an apocalyptic number.

It is an amenable number.

57428724 is an abundant number, since it is smaller than the sum of its proper divisors (76782444).

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

57428724 is a wasteful number, since it uses less digits than its factorization.

57428724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7535 (or 7533 counting only the distinct ones).

The product of its digits is 125440, while the sum is 39.

The square root of 57428724 is about 7578.1741864383. The cubic root of 57428724 is about 385.8125840787.

The spelling of 57428724 in words is "fifty-seven million, four hundred twenty-eight thousand, seven hundred twenty-four".