326305664 has 32 divisors (see below), whose sum is σ = 667641000. Its totient is φ = 158740992.

The previous prime is 326305663. The next prime is 326305687. The reversal of 326305664 is 466503623.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (326305663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29714 + ... + 39185.

Almost surely, 2^326305664 is an apocalyptic number.

It is an amenable number.

326305664 is an abundant number, since it is smaller than the sum of its proper divisors (341335336).

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

326305664 is an equidigital number, since it uses as much as digits as its factorization.

326305664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68950 (or 68938 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 35.

The square root of 326305664 is about 18063.9326836655. The cubic root of 326305664 is about 688.4539099484.

The spelling of 326305664 in words is "three hundred twenty-six million, three hundred five thousand, six hundred sixty-four".