331978680 has 96 divisors (see below), whose sum is σ = 1177029360. Its totient is φ = 80478720.

The previous prime is 331978651. The next prime is 331978693. The reversal of 331978680 is 86879133.

It is a happy number.

It is a super-2 number, since 2×331978680² = 220419687949084800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37957 + ... + 45876.

Almost surely, 2^331978680 is an apocalyptic number.

331978680 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

331978680 is an abundant number, since it is smaller than the sum of its proper divisors (845050680).

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

331978680 is a wasteful number, since it uses less digits than its factorization.

331978680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83861 (or 83854 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 331978680 is about 18220.2821053901. The cubic root of 331978680 is about 692.4207349313.

The spelling of 331978680 in words is "three hundred thirty-one million, nine hundred seventy-eight thousand, six hundred eighty".