320331996 has 60 divisors (see below), whose sum is σ = 840888048. Its totient is φ = 106334208.

The previous prime is 320331961. The next prime is 320332043. The reversal of 320331996 is 699133023.

It is a happy number.

It is a super-2 number, since 2×320331996² = 205225175322688032, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 320331996.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 81345 + ... + 85191.

Almost surely, 2^320331996 is an apocalyptic number.

320331996 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320331996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (420444024).

320331996 is an abundant number, since it is smaller than the sum of its proper divisors (520556052).

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

320331996 is a wasteful number, since it uses less digits than its factorization.

320331996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4120 (or 4109 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 36.

The square root of 320331996 is about 17897.8209846897. The cubic root of 320331996 is about 684.2268407367.

The spelling of 320331996 in words is "three hundred twenty million, three hundred thirty-one thousand, nine hundred ninety-six".