879993864 has 48 divisors (see below), whose sum is σ = 2465505900. Its totient is φ = 283215744.

The previous prime is 879993853. The next prime is 879993871. The reversal of 879993864 is 468399978.

It can be written as a sum of positive squares in 2 ways, for example, as 879596964 + 396900 = 29658^2 + 630^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 208639 + ... + 212814.

Almost surely, 2^879993864 is an apocalyptic number.

It is an amenable number.

879993864 is an abundant number, since it is smaller than the sum of its proper divisors (1585512036).

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

879993864 is a wasteful number, since it uses less digits than its factorization.

879993864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421494 (or 421487 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 63.

The square root of 879993864 is about 29664.6905259435. The cubic root of 879993864 is about 958.2817441231.

The spelling of 879993864 in words is "eight hundred seventy-nine million, nine hundred ninety-three thousand, eight hundred sixty-four".