57090865 has 16 divisors (see below), whose sum is σ = 74220048. Its totient is φ = 41907456.

The previous prime is 57090857. The next prime is 57090881. The reversal of 57090865 is 56809075.

57090865 = 905² + 906² + ... + 969².

It is a happy number.

57090865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 4426816 + 52664049 = 2104^2 + 7257^2 .

It is a cyclic number.

It is not a de Polignac number, because 57090865 - 2³ = 57090857 is a prime.

It is a Duffinian 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 15 ways as a sum of consecutive naturals, for example, 8707 + ... + 13783.

It is an arithmetic number, because the mean of its divisors is an integer number (4638753).

Almost surely, 2^57090865 is an apocalyptic number.

It is an amenable number.

57090865 is a deficient number, since it is larger than the sum of its proper divisors (17129183).

57090865 is a wasteful number, since it uses less digits than its factorization.

57090865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5268.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 57090865 is about 7555.8497205807. The cubic root of 57090865 is about 385.0545040056.

The spelling of 57090865 in words is "fifty-seven million, ninety thousand, eight hundred sixty-five".