321879980 has 12 divisors (see below), whose sum is σ = 675948000. Its totient is φ = 128751984.

The previous prime is 321879967. The next prime is 321880001. The reversal of 321879980 is 89978123.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8046980 + ... + 8047019.

It is an arithmetic number, because the mean of its divisors is an integer number (56329000).

Almost surely, 2^321879980 is an apocalyptic number.

It is an amenable number.

321879980 is an abundant number, since it is smaller than the sum of its proper divisors (354068020).

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

321879980 is a wasteful number, since it uses less digits than its factorization.

321879980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16094008 (or 16094006 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 321879980 is about 17941.0139066888. The cubic root of 321879980 is about 685.3272310123.

The spelling of 321879980 in words is "three hundred twenty-one million, eight hundred seventy-nine thousand, nine hundred eighty".