879811820 has 24 divisors (see below), whose sum is σ = 1890574224. Its totient is φ = 343740096.

The previous prime is 879811811. The next prime is 879811871. The reversal of 879811820 is 28118978.

It is a super-2 number, since 2×879811820² = 1548137677223424800, which contains 22 as substring.

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, 510659 + ... + 512378.

It is an arithmetic number, because the mean of its divisors is an integer number (78773926).

Almost surely, 2^879811820 is an apocalyptic number.

It is an amenable number.

879811820 is an abundant number, since it is smaller than the sum of its proper divisors (1010762404).

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

879811820 is a wasteful number, since it uses less digits than its factorization.

879811820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023089 (or 1023087 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 44.

The square root of 879811820 is about 29661.6220055478. The cubic root of 879811820 is about 958.2156597712.

The spelling of 879811820 in words is "eight hundred seventy-nine million, eight hundred eleven thousand, eight hundred twenty".