320012320 has 48 divisors (see below), whose sum is σ = 757631448. Its totient is φ = 127733760.

The previous prime is 320012309. The next prime is 320012347. The reversal of 320012320 is 23210023.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 169312144 + 150700176 = 13012^2 + 12276^2 .

320012320 is a modest number, since divided by 12320 gives 320 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 320012320.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84712 + ... + 88408.

Almost surely, 2^320012320 is an apocalyptic number.

It is an amenable number.

320012320 is an abundant number, since it is smaller than the sum of its proper divisors (437619128).

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

320012320 is a wasteful number, since it uses less digits than its factorization.

320012320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4253 (or 4245 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 320012320 is about 17888.8881711525. Note that the first 3 decimals coincide. The cubic root of 320012320 is about 683.9991564346. Note that the first 3 decimals are identical.

Adding to 320012320 its reverse (23210023), we get a palindrome (343222343).

The spelling of 320012320 in words is "three hundred twenty million, twelve thousand, three hundred twenty".