3264391728 has 240 divisors, whose sum is σ = 10269342720. Its totient is φ = 961099776.

The previous prime is 3264391727. The next prime is 3264391789. The reversal of 3264391728 is 8271934623.

It is not an unprimeable number, because it can be changed into a prime (3264391723) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8523025 + ... + 8523407.

It is an arithmetic number, because the mean of its divisors is an integer number (42788928).

Almost surely, 2^3264391728 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 3264391728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5134671360).

3264391728 is an abundant number, since it is smaller than the sum of its proper divisors (7004950992).

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

3264391728 is a wasteful number, since it uses less digits than its factorization.

3264391728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596 (or 587 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 3264391728 is about 57134.8556312169. The cubic root of 3264391728 is about 1483.4312474804.

The spelling of 3264391728 in words is "three billion, two hundred sixty-four million, three hundred ninety-one thousand, seven hundred twenty-eight".