863679864 has 32 divisors (see below), whose sum is σ = 2160432720. Its totient is φ = 287728896.

The previous prime is 863679829. The next prime is 863679893. The reversal of 863679864 is 468976368.

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 7 ways as a sum of consecutive naturals, for example, 37084 + ... + 55700.

Almost surely, 2^863679864 is an apocalyptic number.

It is an amenable number.

863679864 is an abundant number, since it is smaller than the sum of its proper divisors (1296752856).

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

863679864 is a wasteful number, since it uses less digits than its factorization.

863679864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20559 (or 20555 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 57.

The square root of 863679864 is about 29388.4307849194. The cubic root of 863679864 is about 952.3229814120.

The spelling of 863679864 in words is "eight hundred sixty-three million, six hundred seventy-nine thousand, eight hundred sixty-four".