56855865 has 64 divisors (see below), whose sum is σ = 104186880. Its totient is φ = 26231040.

The previous prime is 56855861. The next prime is 56855893.

56855865 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 56855865 - 2² = 56855861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56855861) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 408966 + ... + 409104.

It is an arithmetic number, because the mean of its divisors is an integer number (1627920).

Almost surely, 2^56855865 is an apocalyptic number.

56855865 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56855865 is a deficient number, since it is larger than the sum of its proper divisors (47331015).

56855865 is a wasteful number, since it uses less digits than its factorization.

56855865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262.

The product of its digits is 1440000, while the sum is 48.

The square root of 56855865 is about 7540.2828196295. The cubic root of 56855865 is about 384.5254511830.

The spelling of 56855865 in words is "fifty-six million, eight hundred fifty-five thousand, eight hundred sixty-five".