320920928 has 24 divisors (see below), whose sum is σ = 652196160. Its totient is φ = 155283840.

The previous prime is 320920889. The next prime is 320920933. The reversal of 320920928 is 829029023.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160763 + ... + 162746.

It is an arithmetic number, because the mean of its divisors is an integer number (27174840).

Almost surely, 2^320920928 is an apocalyptic number.

It is an amenable number.

320920928 is an abundant number, since it is smaller than the sum of its proper divisors (331275232).

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

320920928 is a wasteful number, since it uses less digits than its factorization.

320920928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323550 (or 323542 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 320920928 is about 17914.2660469247. The cubic root of 320920928 is about 684.6459021988.

The spelling of 320920928 in words is "three hundred twenty million, nine hundred twenty thousand, nine hundred twenty-eight".