879990864 has 40 divisors (see below), whose sum is σ = 2307248160. Its totient is φ = 288951168.

The previous prime is 879990851. The next prime is 879990889. The reversal of 879990864 is 468099978.

It is a junction number, because it is equal to n+sod(n) for n = 879990798 and 879990807.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133599 + ... + 140030.

It is an arithmetic number, because the mean of its divisors is an integer number (57681204).

Almost surely, 2^879990864 is an apocalyptic number.

It is an amenable number.

879990864 is an abundant number, since it is smaller than the sum of its proper divisors (1427257296).

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

879990864 is a wasteful number, since it uses less digits than its factorization.

879990864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273707 (or 273701 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 60.

The square root of 879990864 is about 29664.6399607344. The cubic root of 879990864 is about 958.2806551578.

The spelling of 879990864 in words is "eight hundred seventy-nine million, nine hundred ninety thousand, eight hundred sixty-four".