321392868 has 12 divisors (see below), whose sum is σ = 749916720. Its totient is φ = 107130952.

The previous prime is 321392867. The next prime is 321392873. The reversal of 321392868 is 868293123.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (321392867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13391358 + ... + 13391381.

It is an arithmetic number, because the mean of its divisors is an integer number (62493060).

Almost surely, 2^321392868 is an apocalyptic number.

It is an amenable number.

321392868 is an abundant number, since it is smaller than the sum of its proper divisors (428523852).

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

321392868 is a wasteful number, since it uses less digits than its factorization.

321392868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26782746 (or 26782744 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 321392868 is about 17927.4333913140. The cubic root of 321392868 is about 684.9813467491.

The spelling of 321392868 in words is "three hundred twenty-one million, three hundred ninety-two thousand, eight hundred sixty-eight".