57331890 has 96 divisors (see below), whose sum is σ = 185867136. Its totient is φ = 11911680.

The previous prime is 57331889. The next prime is 57331903. The reversal of 57331890 is 9813375.

57331890 is a `hidden beast` number, since 573 + 3 + 1 + 89 + 0 = 666.

57331890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×57331890² = 6573891221944200, which contains 22 as substring.

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 47 ways as a sum of consecutive naturals, for example, 2794 + ... + 11066.

It is an arithmetic number, because the mean of its divisors is an integer number (1936116).

Almost surely, 2^57331890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57331890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92933568).

57331890 is an abundant number, since it is smaller than the sum of its proper divisors (128535246).

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

57331890 is a wasteful number, since it uses less digits than its factorization.

57331890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8304 (or 8301 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 57331890 is about 7571.7824849899. The cubic root of 57331890 is about 385.5956148744.

The spelling of 57331890 in words is "fifty-seven million, three hundred thirty-one thousand, eight hundred ninety".