331057720 has 96 divisors (see below), whose sum is σ = 879774480. Its totient is φ = 111767040.

The previous prime is 331057717. The next prime is 331057723. The reversal of 331057720 is 27750133.

It is an interprime number because it is at equal distance from previous prime (331057717) and next prime (331057723).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331057723) 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, 130060 + ... + 132580.

Almost surely, 2^331057720 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 331057720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (439887240).

331057720 is an abundant number, since it is smaller than the sum of its proper divisors (548716760).

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

331057720 is a wasteful number, since it uses less digits than its factorization.

331057720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2613 (or 2602 counting only the distinct ones).

The product of its (nonzero) digits is 4410, while the sum is 28.

The square root of 331057720 is about 18194.9916185746. The cubic root of 331057720 is about 691.7798479968.

The spelling of 331057720 in words is "three hundred thirty-one million, fifty-seven thousand, seven hundred twenty".