320728472 has 8 divisors (see below), whose sum is σ = 601365900. Its totient is φ = 160364232.

The previous prime is 320728453. The next prime is 320728483. The reversal of 320728472 is 274827023.

320728472 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20045522 + ... + 20045537.

Almost surely, 2^320728472 is an apocalyptic number.

It is an amenable number.

320728472 is a deficient number, since it is larger than the sum of its proper divisors (280637428).

320728472 is a wasteful number, since it uses less digits than its factorization.

320728472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40091065 (or 40091061 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 320728472 is about 17908.8936565049. The cubic root of 320728472 is about 684.5090143149.

The spelling of 320728472 in words is "three hundred twenty million, seven hundred twenty-eight thousand, four hundred seventy-two".