57978538 has 16 divisors (see below), whose sum is σ = 95526720. Its totient is φ = 26269056.

The previous prime is 57978509. The next prime is 57978539. The reversal of 57978538 is 83587975.

It is not an unprimeable number, because it can be changed into a prime (57978539) 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, 32295 + ... + 34042.

It is an arithmetic number, because the mean of its divisors is an integer number (5970420).

Almost surely, 2^57978538 is an apocalyptic number.

57978538 is a deficient number, since it is larger than the sum of its proper divisors (37548182).

57978538 is a wasteful number, since it uses less digits than its factorization.

57978538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66381.

The product of its digits is 2116800, while the sum is 52.

The square root of 57978538 is about 7614.3639261596. The cubic root of 57978538 is about 387.0399129113.

The spelling of 57978538 in words is "fifty-seven million, nine hundred seventy-eight thousand, five hundred thirty-eight".