3247306640 has 20 divisors (see below), whose sum is σ = 7549988124. Its totient is φ = 1298922624.

The previous prime is 3247306633. The next prime is 3247306687. The reversal of 3247306640 is 466037423.

3247306640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 917120656 + 2330185984 = 30284^2 + 48272^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 3247306640.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20295587 + ... + 20295746.

Almost surely, 2^3247306640 is an apocalyptic number.

It is an amenable number.

3247306640 is an abundant number, since it is smaller than the sum of its proper divisors (4302681484).

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

3247306640 is a wasteful number, since it uses less digits than its factorization.

3247306640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40591346 (or 40591340 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 35.

The square root of 3247306640 is about 56985.1440289485. The cubic root of 3247306640 is about 1480.8387381226.

The spelling of 3247306640 in words is "three billion, two hundred forty-seven million, three hundred six thousand, six hundred forty".