57388770 has 64 divisors (see below), whose sum is σ = 162051840. Its totient is φ = 14402304.

The previous prime is 57388763. The next prime is 57388801. The reversal of 57388770 is 7788375.

57388770 is a `hidden beast` number, since 573 + 8 + 8 + 7 + 70 = 666.

It is a super-2 number, since 2×57388770² = 6586941844225800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1662 + ... + 10841.

It is an arithmetic number, because the mean of its divisors is an integer number (2532060).

Almost surely, 2^57388770 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57388770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81025920).

57388770 is an abundant number, since it is smaller than the sum of its proper divisors (104663070).

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

57388770 is a wasteful number, since it uses less digits than its factorization.

57388770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12536 (or 12530 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 45.

The square root of 57388770 is about 7575.5376046852. The cubic root of 57388770 is about 385.7230915097.

The spelling of 57388770 in words is "fifty-seven million, three hundred eighty-eight thousand, seven hundred seventy".