321390680 has 48 divisors (see below), whose sum is σ = 783049680. Its totient is φ = 118664832.

The previous prime is 321390649. The next prime is 321390683. The reversal of 321390680 is 86093123.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321390683) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17012 + ... + 30531.

It is an arithmetic number, because the mean of its divisors is an integer number (16313535).

Almost surely, 2^321390680 is an apocalyptic number.

It is an amenable number.

321390680 is an abundant number, since it is smaller than the sum of its proper divisors (461659000).

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

321390680 is a wasteful number, since it uses less digits than its factorization.

321390680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47580 (or 47563 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 321390680 is about 17927.3723674163. The cubic root of 321390680 is about 684.9797923248.

The spelling of 321390680 in words is "three hundred twenty-one million, three hundred ninety thousand, six hundred eighty".