331666992 has 120 divisors (see below), whose sum is σ = 974937600. Its totient is φ = 105055104.

The previous prime is 331666961. The next prime is 331667003. The reversal of 331666992 is 299666133.

It is a happy number.

It is a super-2 number, since 2×331666992² = 220005987164656128, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 791359 + ... + 791777.

It is an arithmetic number, because the mean of its divisors is an integer number (8124480).

Almost surely, 2^331666992 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 331666992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (487468800).

331666992 is an abundant number, since it is smaller than the sum of its proper divisors (643270608).

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

331666992 is a wasteful number, since it uses less digits than its factorization.

331666992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695 (or 686 counting only the distinct ones).

The product of its digits is 314928, while the sum is 45.

The square root of 331666992 is about 18211.7267715063. The cubic root of 331666992 is about 692.2039671838.

The spelling of 331666992 in words is "three hundred thirty-one million, six hundred sixty-six thousand, nine hundred ninety-two".