320976660 has 96 divisors (see below), whose sum is σ = 960664320. Its totient is φ = 79792128.

The previous prime is 320976653. The next prime is 320976679. The reversal of 320976660 is 66679023.

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 31 ways as a sum of consecutive naturals, for example, 109737 + ... + 112623.

It is an arithmetic number, because the mean of its divisors is an integer number (10006920).

Almost surely, 2^320976660 is an apocalyptic number.

320976660 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320976660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (480332160).

320976660 is an abundant number, since it is smaller than the sum of its proper divisors (639687660).

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

320976660 is a wasteful number, since it uses less digits than its factorization.

320976660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3025 (or 3023 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 39.

The square root of 320976660 is about 17915.8214994457. The cubic root of 320976660 is about 684.6855323938.

The spelling of 320976660 in words is "three hundred twenty million, nine hundred seventy-six thousand, six hundred sixty".