864820768 has 24 divisors (see below), whose sum is σ = 1945847232. Its totient is φ = 370637376.

The previous prime is 864820757. The next prime is 864820799. The reversal of 864820768 is 867028468.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1930180 + ... + 1930627.

It is an arithmetic number, because the mean of its divisors is an integer number (81076968).

Almost surely, 2^864820768 is an apocalyptic number.

It is an amenable number.

864820768 is an abundant number, since it is smaller than the sum of its proper divisors (1081026464).

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

864820768 is a wasteful number, since it uses less digits than its factorization.

864820768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3860824 (or 3860816 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 49.

The square root of 864820768 is about 29407.8351464367. The cubic root of 864820768 is about 952.7421301715.

The spelling of 864820768 in words is "eight hundred sixty-four million, eight hundred twenty thousand, seven hundred sixty-eight".