57428784 has 120 divisors (see below), whose sum is σ = 191825520. Its totient is φ = 16402176.

The previous prime is 57428759. The next prime is 57428801. The reversal of 57428784 is 48782475.

57428784 is a `hidden beast` number, since 574 + 2 + 8 + 78 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19812 + ... + 22524.

It is an arithmetic number, because the mean of its divisors is an integer number (1598546).

Almost surely, 2^57428784 is an apocalyptic number.

57428784 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57428784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95912760).

57428784 is an abundant number, since it is smaller than the sum of its proper divisors (134396736).

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

57428784 is a wasteful number, since it uses less digits than its factorization.

57428784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2744 (or 2725 counting only the distinct ones).

The product of its digits is 501760, while the sum is 45.

The square root of 57428784 is about 7578.1781451745. The cubic root of 57428784 is about 385.8127184408.

The spelling of 57428784 in words is "fifty-seven million, four hundred twenty-eight thousand, seven hundred eighty-four".