57087989 has 24 divisors (see below), whose sum is σ = 74036160. Its totient is φ = 43618176.

The previous prime is 57087977. The next prime is 57087991. The reversal of 57087989 is 98978075.

It is not a de Polignac number, because 57087989 - 2⁸ = 57087733 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57087989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51087989) by changing a digit.

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 in 23 ways as a sum of consecutive naturals, for example, 14024 + ... + 17630.

It is an arithmetic number, because the mean of its divisors is an integer number (3084840).

Almost surely, 2^57087989 is an apocalyptic number.

It is an amenable number.

57087989 is a deficient number, since it is larger than the sum of its proper divisors (16948171).

57087989 is a wasteful number, since it uses less digits than its factorization.

57087989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3657 (or 3650 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 53.

The square root of 57087989 is about 7555.6594020641. The cubic root of 57087989 is about 385.0480380830.

The spelling of 57087989 in words is "fifty-seven million, eighty-seven thousand, nine hundred eighty-nine".