331491768 has 16 divisors (see below), whose sum is σ = 828729480. Its totient is φ = 110497248.

The previous prime is 331491749. The next prime is 331491817. The reversal of 331491768 is 867194133.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 6906055 + ... + 6906102.

Almost surely, 2^331491768 is an apocalyptic number.

It is an amenable number.

331491768 is an abundant number, since it is smaller than the sum of its proper divisors (497237712).

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

331491768 is a wasteful number, since it uses less digits than its factorization.

331491768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13812166 (or 13812162 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 331491768 is about 18206.9153894887. The cubic root of 331491768 is about 692.0820455807.

The spelling of 331491768 in words is "three hundred thirty-one million, four hundred ninety-one thousand, seven hundred sixty-eight".