331397952 has 28 divisors (see below), whose sum is σ = 876824256. Its totient is φ = 110465920.

The previous prime is 331397917. The next prime is 331397971. The reversal of 331397952 is 259793133.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 862824 + ... + 863207.

It is an arithmetic number, because the mean of its divisors is an integer number (31315152).

Almost surely, 2^331397952 is an apocalyptic number.

331397952 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

331397952 is an abundant number, since it is smaller than the sum of its proper divisors (545426304).

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

331397952 is a wasteful number, since it uses less digits than its factorization.

331397952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1726046 (or 1726036 counting only the distinct ones).

The product of its digits is 153090, while the sum is 42.

The square root of 331397952 is about 18204.3388234783. The cubic root of 331397952 is about 692.0167503491.

The spelling of 331397952 in words is "three hundred thirty-one million, three hundred ninety-seven thousand, nine hundred fifty-two".