321739264 has 80 divisors (see below), whose sum is σ = 801573696. Its totient is φ = 125337600.

The previous prime is 321739247. The next prime is 321739267. The reversal of 321739264 is 462937123.

It is not an unprimeable number, because it can be changed into a prime (321739267) by changing a digit.

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, 35344 + ... + 43504.

Almost surely, 2^321739264 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 321739264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (400786848).

321739264 is an abundant number, since it is smaller than the sum of its proper divisors (479834432).

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

321739264 is an equidigital number, since it uses as much as digits as its factorization.

321739264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8197 (or 8181 counting only the distinct ones).

The product of its digits is 54432, while the sum is 37.

The square root of 321739264 is about 17937.0918490150. The cubic root of 321739264 is about 685.2273484794.

It can be divided in two parts, 321739 and 264, that added together give a triangular number (322003 = T₈₀₂).

The spelling of 321739264 in words is "three hundred twenty-one million, seven hundred thirty-nine thousand, two hundred sixty-four".