321374720 has 80 divisors (see below), whose sum is σ = 787235328. Its totient is φ = 125767680.

The previous prime is 321374701. The next prime is 321374741. The reversal of 321374720 is 27473123.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118985 + ... + 121655.

Almost surely, 2^321374720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321374720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (393617664).

321374720 is an abundant number, since it is smaller than the sum of its proper divisors (465860608).

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

321374720 is an equidigital number, since it uses as much as digits as its factorization.

321374720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2741 (or 2725 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 321374720 is about 17926.9272325181. The cubic root of 321374720 is about 684.9684536238.

The spelling of 321374720 in words is "three hundred twenty-one million, three hundred seventy-four thousand, seven hundred twenty".