57631320 has 48 divisors (see below), whose sum is σ = 187302960. Its totient is φ = 15368256.

The previous prime is 57631297. The next prime is 57631331. The reversal of 57631320 is 2313675.

It is a happy number.

57631320 is a `hidden beast` number, since 5 + 7 + 631 + 3 + 20 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79684 + ... + 80403.

It is an arithmetic number, because the mean of its divisors is an integer number (3902145).

Almost surely, 2^57631320 is an apocalyptic number.

It is an amenable number.

57631320 is an abundant number, since it is smaller than the sum of its proper divisors (129671640).

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

57631320 is a wasteful number, since it uses less digits than its factorization.

57631320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160104 (or 160097 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 57631320 is about 7591.5294901620. The cubic root of 57631320 is about 386.2657391393.

Adding to 57631320 its reverse (2313675), we get a palindrome (59944995).

The spelling of 57631320 in words is "fifty-seven million, six hundred thirty-one thousand, three hundred twenty".