326402720 has 288 divisors, whose sum is σ = 992839680. Its totient is φ = 100638720.

The previous prime is 326402711. The next prime is 326402749. The reversal of 326402720 is 27204623.

It is a self number, because there is not a number n which added to its sum of digits gives 326402720.

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 47 ways as a sum of consecutive naturals, for example, 4131641 + ... + 4131719.

It is an arithmetic number, because the mean of its divisors is an integer number (3447360).

Almost surely, 2^326402720 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 326402720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (496419840).

326402720 is an abundant number, since it is smaller than the sum of its proper divisors (666436960).

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

326402720 is a wasteful number, since it uses less digits than its factorization.

326402720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 326402720 is about 18066.6189421264. The cubic root of 326402720 is about 688.5221608415.

The spelling of 326402720 in words is "three hundred twenty-six million, four hundred two thousand, seven hundred twenty".