320730528 has 24 divisors (see below), whose sum is σ = 841917888. Its totient is φ = 106910144.

The previous prime is 320730523. The next prime is 320730539. The reversal of 320730528 is 825037023.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 320730495 and 320730504.

It is not an unprimeable number, because it can be changed into a prime (320730523) 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, 1670376 + ... + 1670567.

It is an arithmetic number, because the mean of its divisors is an integer number (35079912).

Almost surely, 2^320730528 is an apocalyptic number.

It is an amenable number.

320730528 is an abundant number, since it is smaller than the sum of its proper divisors (521187360).

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

320730528 is a wasteful number, since it uses less digits than its factorization.

320730528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3340956 (or 3340948 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 320730528 is about 17908.9510580603. The cubic root of 320730528 is about 684.5104769723.

The spelling of 320730528 in words is "three hundred twenty million, seven hundred thirty thousand, five hundred twenty-eight".