321804680 has 16 divisors (see below), whose sum is σ = 724060620. Its totient is φ = 128721856.

The previous prime is 321804667. The next prime is 321804689. The reversal of 321804680 is 86408123.

It can be written as a sum of positive squares in 2 ways, for example, as 321054724 + 749956 = 17918^2 + 866^2 .

It is not an unprimeable number, because it can be changed into a prime (321804689) by changing a digit.

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, 4022519 + ... + 4022598.

Almost surely, 2^321804680 is an apocalyptic number.

It is an amenable number.

321804680 is an abundant number, since it is smaller than the sum of its proper divisors (402255940).

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

321804680 is a wasteful number, since it uses less digits than its factorization.

321804680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8045128 (or 8045124 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 321804680 is about 17938.9152403371. The cubic root of 321804680 is about 685.2737854546.

The spelling of 321804680 in words is "three hundred twenty-one million, eight hundred four thousand, six hundred eighty".