331055928 has 96 divisors (see below), whose sum is σ = 1069286400. Its totient is φ = 90471744.

The previous prime is 331055891. The next prime is 331055929. The reversal of 331055928 is 829550133.

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

It is a junction number, because it is equal to n+sod(n) for n = 331055892 and 331055901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331055929) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2688 + ... + 25871.

It is an arithmetic number, because the mean of its divisors is an integer number (11138400).

Almost surely, 2^331055928 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 331055928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (534643200).

331055928 is an abundant number, since it is smaller than the sum of its proper divisors (738230472).

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

331055928 is a wasteful number, since it uses less digits than its factorization.

331055928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28601 (or 28594 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 331055928 is about 18194.9423741874. The cubic root of 331055928 is about 691.7785998038.

The spelling of 331055928 in words is "three hundred thirty-one million, fifty-five thousand, nine hundred twenty-eight".