331686992 has 80 divisors (see below), whose sum is σ = 796532352. Its totient is φ = 130291200.

The previous prime is 331686991. The next prime is 331686997. The reversal of 331686992 is 299686133.

It is a super-2 number, since 2×331686992² = 220032521324016128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331686991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 227867 + ... + 229317.

Almost surely, 2^331686992 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 331686992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (398266176).

331686992 is an abundant number, since it is smaller than the sum of its proper divisors (464845360).

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

331686992 is a wasteful number, since it uses less digits than its factorization.

331686992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636 (or 1630 counting only the distinct ones).

The product of its digits is 419904, while the sum is 47.

The square root of 331686992 is about 18212.2758599797. The cubic root of 331686992 is about 692.2178805381.

The spelling of 331686992 in words is "three hundred thirty-one million, six hundred eighty-six thousand, nine hundred ninety-two".