320304404 has 12 divisors (see below), whose sum is σ = 640608864. Its totient is φ = 137273304.

The previous prime is 320304403. The next prime is 320304407. The reversal of 320304404 is 404403023.

It is a happy number.

320304404 is an admirable number.

It is a super-2 number, since 2×320304404² = 205189822443590432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320304403) 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, 5719694 + ... + 5719749.

It is an arithmetic number, because the mean of its divisors is an integer number (53384072).

Almost surely, 2^320304404 is an apocalyptic number.

It is an amenable number.

320304404 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

320304404 is a wasteful number, since it uses less digits than its factorization.

320304404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11439454 (or 11439452 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 320304404 is about 17897.0501479993. The cubic root of 320304404 is about 684.2071947347.

Adding to 320304404 its reverse (404403023), we get a palindrome (724707427).

The spelling of 320304404 in words is "three hundred twenty million, three hundred four thousand, four hundred four".