331840320 has 448 divisors, whose sum is σ = 1334292480. Its totient is φ = 68124672.

The previous prime is 331840307. The next prime is 331840321. The reversal of 331840320 is 23048133.

It is a tau number, because it is divible by the number of its divisors (448).

It is a super-2 number, since 2×331840320² = 220235995955404800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331840321) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2936584 + ... + 2936696.

Almost surely, 2^331840320 is an apocalyptic number.

331840320 is a gapful number since it is divisible by the number (30) 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 331840320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (667146240).

331840320 is an abundant number, since it is smaller than the sum of its proper divisors (1002452160).

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

331840320 is a wasteful number, since it uses less digits than its factorization.

331840320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182 (or 172 counting only the distinct ones).

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

The square root of 331840320 is about 18216.4848420325. The cubic root of 331840320 is about 692.3245273019.

Adding to 331840320 its reverse (23048133), we get a palindrome (354888453).

The spelling of 331840320 in words is "three hundred thirty-one million, eight hundred forty thousand, three hundred twenty".