320716928 has 64 divisors (see below), whose sum is σ = 733518720. Its totient is φ = 136826880.

The previous prime is 320716909. The next prime is 320716933. The reversal of 320716928 is 829617023.

320716928 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 (64).

It is a junction number, because it is equal to n+sod(n) for n = 320716891 and 320716900.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234968 + ... + 236328.

It is an arithmetic number, because the mean of its divisors is an integer number (11461230).

Almost surely, 2^320716928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320716928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (366759360).

320716928 is an abundant number, since it is smaller than the sum of its proper divisors (412801792).

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

320716928 is a wasteful number, since it uses less digits than its factorization.

320716928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1645 (or 1633 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 320716928 is about 17908.5713556386. The cubic root of 320716928 is about 684.5008016911.

The spelling of 320716928 in words is "three hundred twenty million, seven hundred sixteen thousand, nine hundred twenty-eight".