57387988 has 24 divisors (see below), whose sum is σ = 121528512. Its totient is φ = 23147904.

The previous prime is 57387983. The next prime is 57387997. The reversal of 57387988 is 88978375.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57387983) 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, 59806 + ... + 60757.

It is an arithmetic number, because the mean of its divisors is an integer number (5063688).

Almost surely, 2^57387988 is an apocalyptic number.

It is an amenable number.

57387988 is an abundant number, since it is smaller than the sum of its proper divisors (64140524).

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

57387988 is a wasteful number, since it uses less digits than its factorization.

57387988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120591 (or 120589 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 55.

The square root of 57387988 is about 7575.4859910107. The cubic root of 57387988 is about 385.7213395013.

The spelling of 57387988 in words is "fifty-seven million, three hundred eighty-seven thousand, nine hundred eighty-eight".