57998986 has 16 divisors (see below), whose sum is σ = 88560000. Its totient is φ = 28483488.

The previous prime is 57998981. The next prime is 57998999. The reversal of 57998986 is 68989975.

It is not an unprimeable number, because it can be changed into a prime (57998981) 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, 28015 + ... + 30013.

It is an arithmetic number, because the mean of its divisors is an integer number (5535000).

Almost surely, 2^57998986 is an apocalyptic number.

57998986 is a deficient number, since it is larger than the sum of its proper divisors (30561014).

57998986 is a wasteful number, since it uses less digits than its factorization.

57998986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2253.

The product of its digits is 9797760, while the sum is 61.

The square root of 57998986 is about 7615.7065332115. The cubic root of 57998986 is about 387.0854082629.

The spelling of 57998986 in words is "fifty-seven million, nine hundred ninety-eight thousand, nine hundred eighty-six".