979820 has 12 divisors (see below), whose sum is σ = 2057664. Its totient is φ = 391920.

The previous prime is 979819. The next prime is 979831. The reversal of 979820 is 28979.

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 3 ways as a sum of consecutive naturals, for example, 24476 + ... + 24515.

It is an arithmetic number, because the mean of its divisors is an integer number (171472).

2⁹⁷⁹⁸²⁰ is an apocalyptic number.

It is an amenable number.

979820 is an abundant number, since it is smaller than the sum of its proper divisors (1077844).

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

979820 is a wasteful number, since it uses less digits than its factorization.

979820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49000 (or 48998 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 979820 is about 989.8585757572. The cubic root of 979820 is about 99.3227571081.

The spelling of 979820 in words is "nine hundred seventy-nine thousand, eight hundred twenty".