865858056 has 32 divisors (see below), whose sum is σ = 2473880640. Its totient is φ = 247387968.

The previous prime is 865858031. The next prime is 865858061. The reversal of 865858056 is 650858568.

865858056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2576791 + ... + 2577126.

It is an arithmetic number, because the mean of its divisors is an integer number (77308770).

Almost surely, 2^865858056 is an apocalyptic number.

It is an amenable number.

865858056 is an abundant number, since it is smaller than the sum of its proper divisors (1608022584).

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

865858056 is a wasteful number, since it uses less digits than its factorization.

865858056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5153933 (or 5153929 counting only the distinct ones).

The product of its (nonzero) digits is 2304000, while the sum is 51.

The square root of 865858056 is about 29425.4661135554. The cubic root of 865858056 is about 953.1228923519.

The spelling of 865858056 in words is "eight hundred sixty-five million, eight hundred fifty-eight thousand, fifty-six".