321043680 has 72 divisors (see below), whose sum is σ = 1095566472. Its totient is φ = 85611264.

The previous prime is 321043663. The next prime is 321043739. The reversal of 321043680 is 86340123.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

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 11 ways as a sum of consecutive naturals, for example, 110034 + ... + 112913.

It is an arithmetic number, because the mean of its divisors is an integer number (15216201).

Almost surely, 2^321043680 is an apocalyptic number.

321043680 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

321043680 is an abundant number, since it is smaller than the sum of its proper divisors (774522792).

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

321043680 is a wasteful number, since it uses less digits than its factorization.

321043680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222968 (or 222957 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 321043680 is about 17917.6918156329. The cubic root of 321043680 is about 684.7331832427.

The spelling of 321043680 in words is "three hundred twenty-one million, forty-three thousand, six hundred eighty".