320920404 has 48 divisors (see below), whose sum is σ = 873264000. Its totient is φ = 91690368.

The previous prime is 320920399. The next prime is 320920417. The reversal of 320920404 is 404029023.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34869 + ... + 43100.

It is an arithmetic number, because the mean of its divisors is an integer number (18193000).

Almost surely, 2^320920404 is an apocalyptic number.

It is an amenable number.

320920404 is an abundant number, since it is smaller than the sum of its proper divisors (552343596).

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

320920404 is a wasteful number, since it uses less digits than its factorization.

320920404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77997 (or 77981 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 320920404 is about 17914.2514217033. The cubic root of 320920404 is about 684.6455295684.

Adding to 320920404 its reverse (404029023), we get a palindrome (724949427).

The spelling of 320920404 in words is "three hundred twenty million, nine hundred twenty thousand, four hundred four".