320311404 has 72 divisors (see below), whose sum is σ = 927003168. Its totient is φ = 91353600.

The previous prime is 320311373. The next prime is 320311417. The reversal of 320311404 is 404113023.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 23 ways as a sum of consecutive naturals, for example, 245554 + ... + 246854.

It is an arithmetic number, because the mean of its divisors is an integer number (12875044).

Almost surely, 2^320311404 is an apocalyptic number.

It is an amenable number.

320311404 is an abundant number, since it is smaller than the sum of its proper divisors (606691764).

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

320311404 is a wasteful number, since it uses less digits than its factorization.

320311404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2295 (or 2290 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 320311404 is about 17897.2457098851. The cubic root of 320311404 is about 684.2121789679.

Adding to 320311404 its reverse (404113023), we get a palindrome (724424427).

The spelling of 320311404 in words is "three hundred twenty million, three hundred eleven thousand, four hundred four".