57000090 has 32 divisors (see below), whose sum is σ = 156343680. Its totient is φ = 13028544.

The previous prime is 57000089. The next prime is 57000107. The reversal of 57000090 is 9000075.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135505 + ... + 135924.

It is an arithmetic number, because the mean of its divisors is an integer number (4885740).

Almost surely, 2^57000090 is an apocalyptic number.

57000090 is an abundant number, since it is smaller than the sum of its proper divisors (99343590).

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

57000090 is a wasteful number, since it uses less digits than its factorization.

57000090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271446.

The product of its (nonzero) digits is 315, while the sum is 21.

The square root of 57000090 is about 7549.8403956640. The cubic root of 57000090 is about 384.8503156803.

The spelling of 57000090 in words is "fifty-seven million, ninety", and thus it is an aban number and an uban number.