879820 has 12 divisors (see below), whose sum is σ = 1847664. Its totient is φ = 351920.

The previous prime is 879817. The next prime is 879821. The reversal of 879820 is 28978.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (879821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21976 + ... + 22015.

It is an arithmetic number, because the mean of its divisors is an integer number (153972).

2⁸⁷⁹⁸²⁰ is an apocalyptic number.

It is an amenable number.

879820 is an abundant number, since it is smaller than the sum of its proper divisors (967844).

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

879820 is a wasteful number, since it uses less digits than its factorization.

879820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44000 (or 43998 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 879820 is about 937.9872067358. The cubic root of 879820 is about 95.8218629414.

The spelling of 879820 in words is "eight hundred seventy-nine thousand, eight hundred twenty".