326564736 has 64 divisors (see below), whose sum is σ = 872467200. Its totient is φ = 108224000.

The previous prime is 326564731. The next prime is 326564743. The reversal of 326564736 is 637465623.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (326564731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66361 + ... + 71111.

It is an arithmetic number, because the mean of its divisors is an integer number (13632300).

Almost surely, 2^326564736 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 326564736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (436233600).

326564736 is an abundant number, since it is smaller than the sum of its proper divisors (545902464).

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

326564736 is a wasteful number, since it uses less digits than its factorization.

326564736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4947 (or 4935 counting only the distinct ones).

The product of its digits is 544320, while the sum is 42.

The square root of 326564736 is about 18071.1022353369. The cubic root of 326564736 is about 688.6360622152.

The spelling of 326564736 in words is "three hundred twenty-six million, five hundred sixty-four thousand, seven hundred thirty-six".