57012840 has 192 divisors, whose sum is σ = 197683200. Its totient is φ = 14224896.

The previous prime is 57012829. The next prime is 57012847. The reversal of 57012840 is 4821075.

57012840 is a `hidden beast` number, since 570 + 12 + 84 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (57012847) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 448857 + ... + 448983.

It is an arithmetic number, because the mean of its divisors is an integer number (1029600).

Almost surely, 2^57012840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57012840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98841600).

57012840 is an abundant number, since it is smaller than the sum of its proper divisors (140670360).

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

57012840 is a wasteful number, since it uses less digits than its factorization.

57012840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 57012840 is about 7550.6847371613. The cubic root of 57012840 is about 384.8790084754.

The spelling of 57012840 in words is "fifty-seven million, twelve thousand, eight hundred forty".