57138988 has 6 divisors (see below), whose sum is σ = 99993236. Its totient is φ = 28569492.

The previous prime is 57138973. The next prime is 57139003. The reversal of 57138988 is 88983175.

It is an interprime number because it is at equal distance from previous prime (57138973) and next prime (57139003).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7142370 + ... + 7142377.

Almost surely, 2^57138988 is an apocalyptic number.

It is an amenable number.

57138988 is a deficient number, since it is larger than the sum of its proper divisors (42854248).

57138988 is a wasteful number, since it uses less digits than its factorization.

57138988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14284751 (or 14284749 counting only the distinct ones).

The product of its digits is 483840, while the sum is 49.

The square root of 57138988 is about 7559.0335361076. The cubic root of 57138988 is about 385.1626635971.

The spelling of 57138988 in words is "fifty-seven million, one hundred thirty-eight thousand, nine hundred eighty-eight".