864565976 has 16 divisors (see below), whose sum is σ = 1664874240. Its totient is φ = 420599520.

The previous prime is 864565927. The next prime is 864565981. The reversal of 864565976 is 679565468.

It is a happy number.

It is a congruent number.

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, 1460120 + ... + 1460711.

It is an arithmetic number, because the mean of its divisors is an integer number (104054640).

Almost surely, 2^864565976 is an apocalyptic number.

It is an amenable number.

864565976 is a deficient number, since it is larger than the sum of its proper divisors (800308264).

864565976 is a wasteful number, since it uses less digits than its factorization.

864565976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2920874 (or 2920870 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 56.

The square root of 864565976 is about 29403.5027845323. The cubic root of 864565976 is about 952.6485559014.

The spelling of 864565976 in words is "eight hundred sixty-four million, five hundred sixty-five thousand, nine hundred seventy-six".