320513604 has 24 divisors (see below), whose sum is σ = 748321728. Its totient is φ = 106772640.

The previous prime is 320513593. The next prime is 320513617. The reversal of 320513604 is 406315023.

It is a happy number.

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, 14934 + ... + 29394.

It is an arithmetic number, because the mean of its divisors is an integer number (31180072).

Almost surely, 2^320513604 is an apocalyptic number.

It is an amenable number.

320513604 is an abundant number, since it is smaller than the sum of its proper divisors (427808124).

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

320513604 is a wasteful number, since it uses less digits than its factorization.

320513604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16315 (or 16313 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 320513604 is about 17902.8937325785. The cubic root of 320513604 is about 684.3561207694.

Adding to 320513604 its reverse (406315023), we get a palindrome (726828627).

The spelling of 320513604 in words is "three hundred twenty million, five hundred thirteen thousand, six hundred four".