57391089 has 16 divisors (see below), whose sum is σ = 89315328. Its totient is φ = 32096592.

The previous prime is 57391079. The next prime is 57391091. The reversal of 57391089 is 98019375.

It is a happy number.

It is not a de Polignac number, because 57391089 - 2⁷ = 57390961 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57391089.

It is not an unprimeable number, because it can be changed into a prime (57391069) 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, 28087 + ... + 30060.

It is an arithmetic number, because the mean of its divisors is an integer number (5582208).

Almost surely, 2^57391089 is an apocalyptic number.

It is an amenable number.

57391089 is a deficient number, since it is larger than the sum of its proper divisors (31924239).

57391089 is a wasteful number, since it uses less digits than its factorization.

57391089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58204.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 57391089 is about 7575.6906615833. The cubic root of 57391089 is about 385.7282869501.

The spelling of 57391089 in words is "fifty-seven million, three hundred ninety-one thousand, eighty-nine".