331285944 has 64 divisors (see below), whose sum is σ = 918864000. Its totient is φ = 98683520.

The previous prime is 331285931. The next prime is 331285949. The reversal of 331285944 is 449582133.

331285944 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×331285944² = 219500753383942272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331285949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4942 + ... + 26210.

It is an arithmetic number, because the mean of its divisors is an integer number (14357250).

Almost surely, 2^331285944 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 331285944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (459432000).

331285944 is an abundant number, since it is smaller than the sum of its proper divisors (587578056).

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

331285944 is a wasteful number, since it uses less digits than its factorization.

331285944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21348 (or 21344 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 331285944 is about 18201.2621540376. The cubic root of 331285944 is about 691.9387774810.

The spelling of 331285944 in words is "three hundred thirty-one million, two hundred eighty-five thousand, nine hundred forty-four".