57991895 has 16 divisors (see below), whose sum is σ = 78889440. Its totient is φ = 40569984.

The previous prime is 57991891. The next prime is 57991931. The reversal of 57991895 is 59819975.

It is not a de Polignac number, because 57991895 - 2² = 57991891 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57991891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22244 + ... + 24713.

It is an arithmetic number, because the mean of its divisors is an integer number (4930590).

Almost surely, 2^57991895 is an apocalyptic number.

57991895 is a deficient number, since it is larger than the sum of its proper divisors (20897545).

57991895 is a wasteful number, since it uses less digits than its factorization.

57991895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46994.

The product of its digits is 1020600, while the sum is 53.

The square root of 57991895 is about 7615.2409679537. The cubic root of 57991895 is about 387.0696325015.

The spelling of 57991895 in words is "fifty-seven million, nine hundred ninety-one thousand, eight hundred ninety-five".