57288990 has 64 divisors (see below), whose sum is σ = 157904640. Its totient is φ = 13155840.

The previous prime is 57288967. The next prime is 57289019. The reversal of 57288990 is 9988275.

It is a happy number.

57288990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1702 + ... + 10838.

It is an arithmetic number, because the mean of its divisors is an integer number (2467260).

Almost surely, 2^57288990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57288990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78952320).

57288990 is an abundant number, since it is smaller than the sum of its proper divisors (100615650).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57288990 is a wasteful number, since it uses less digits than its factorization.

57288990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9177.

The product of its (nonzero) digits is 362880, while the sum is 48.

The square root of 57288990 is about 7568.9490683978. The cubic root of 57288990 is about 385.4994137340.

The spelling of 57288990 in words is "fifty-seven million, two hundred eighty-eight thousand, nine hundred ninety".