326491264 has 64 divisors (see below), whose sum is σ = 712514880. Its totient is φ = 147788800.

The previous prime is 326491247. The next prime is 326491271. The reversal of 326491264 is 462194623.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 648837 + ... + 649339.

It is an arithmetic number, because the mean of its divisors is an integer number (11133045).

Almost surely, 2^326491264 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 326491264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (356257440).

326491264 is an abundant number, since it is smaller than the sum of its proper divisors (386023616).

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

326491264 is a wasteful number, since it uses less digits than its factorization.

326491264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989 (or 977 counting only the distinct ones).

The product of its digits is 62208, while the sum is 37.

The square root of 326491264 is about 18069.0692621397. The cubic root of 326491264 is about 688.5844141977.

The spelling of 326491264 in words is "three hundred twenty-six million, four hundred ninety-one thousand, two hundred sixty-four".