321768680 has 16 divisors (see below), whose sum is σ = 723979620. Its totient is φ = 128707456.

The previous prime is 321768679. The next prime is 321768709. The reversal of 321768680 is 86867123.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 315488644 + 6280036 = 17762^2 + 2506^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4022069 + ... + 4022148.

Almost surely, 2^321768680 is an apocalyptic number.

It is an amenable number.

321768680 is an abundant number, since it is smaller than the sum of its proper divisors (402210940).

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

321768680 is a wasteful number, since it uses less digits than its factorization.

321768680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8044228 (or 8044224 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 321768680 is about 17937.9118071196. The cubic root of 321768680 is about 685.2482308477.

The spelling of 321768680 in words is "three hundred twenty-one million, seven hundred sixty-eight thousand, six hundred eighty".