320031404 has 48 divisors (see below), whose sum is σ = 715309056. Its totient is φ = 121641600.

The previous prime is 320031401. The next prime is 320031419. The reversal of 320031404 is 404130023.

It is a super-2 number, since 2×320031404² = 204840199092422432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (320031401) by changing a digit.

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, 44 + ... + 25299.

It is an arithmetic number, because the mean of its divisors is an integer number (14902272).

Almost surely, 2^320031404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320031404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (357654528).

320031404 is an abundant number, since it is smaller than the sum of its proper divisors (395277652).

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

320031404 is a wasteful number, since it uses less digits than its factorization.

320031404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25406 (or 25404 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 320031404 is about 17889.4215669484. The cubic root of 320031404 is about 684.0127529740.

Adding to 320031404 its reverse (404130023), we get a palindrome (724161427).

The spelling of 320031404 in words is "three hundred twenty million, thirty-one thousand, four hundred four".