57881640 has 32 divisors (see below), whose sum is σ = 173645280. Its totient is φ = 15435072.

The previous prime is 57881633. The next prime is 57881669. The reversal of 57881640 is 4618875.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241054 + ... + 241293.

It is an arithmetic number, because the mean of its divisors is an integer number (5426415).

Almost surely, 2^57881640 is an apocalyptic number.

It is an amenable number.

57881640 is an abundant number, since it is smaller than the sum of its proper divisors (115763640).

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

57881640 is a wasteful number, since it uses less digits than its factorization.

57881640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482361 (or 482357 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 57881640 is about 7607.9984227128. The cubic root of 57881640 is about 386.8241761518.

The spelling of 57881640 in words is "fifty-seven million, eight hundred eighty-one thousand, six hundred forty".