57656380 has 24 divisors (see below), whose sum is σ = 121242240. Its totient is φ = 23031360.

The previous prime is 57656369. The next prime is 57656387. The reversal of 57656380 is 8365675.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57656387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18366 + ... + 21274.

It is an arithmetic number, because the mean of its divisors is an integer number (5051760).

Almost surely, 2^57656380 is an apocalyptic number.

It is an amenable number.

57656380 is an abundant number, since it is smaller than the sum of its proper divisors (63585860).

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

57656380 is a wasteful number, since it uses less digits than its factorization.

57656380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3909 (or 3907 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 57656380 is about 7593.1798345621. The cubic root of 57656380 is about 386.3217180569.

The spelling of 57656380 in words is "fifty-seven million, six hundred fifty-six thousand, three hundred eighty".