56857665 has 16 divisors (see below), whose sum is σ = 91099008. Its totient is φ = 30281856.

The previous prime is 56857657. The next prime is 56857667. The reversal of 56857665 is 56675865.

It is not a de Polignac number, because 56857665 - 2³ = 56857657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56857667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10644 + ... + 15066.

It is an arithmetic number, because the mean of its divisors is an integer number (5693688).

Almost surely, 2^56857665 is an apocalyptic number.

It is an amenable number.

56857665 is a deficient number, since it is larger than the sum of its proper divisors (34241343).

56857665 is a wasteful number, since it uses less digits than its factorization.

56857665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5288.

The product of its digits is 1512000, while the sum is 48.

The square root of 56857665 is about 7540.4021776030. The cubic root of 56857665 is about 384.5295090377.

The spelling of 56857665 in words is "fifty-six million, eight hundred fifty-seven thousand, six hundred sixty-five".