3243253644 has 72 divisors (see below), whose sum is σ = 8590694112. Its totient is φ = 1029726720.

The previous prime is 3243253631. The next prime is 3243253649. The reversal of 3243253644 is 4463523423.

3243253644 is a `hidden beast` number, since 3 + 2 + 4 + 3 + 2 + 5 + 3 + 644 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 3243253599 and 3243253608.

It is not an unprimeable number, because it can be changed into a prime (3243253649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 191422 + ... + 207674.

It is an arithmetic number, because the mean of its divisors is an integer number (119315196).

Almost surely, 2^3243253644 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 3243253644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4295347056).

3243253644 is an abundant number, since it is smaller than the sum of its proper divisors (5347440468).

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

3243253644 is a wasteful number, since it uses less digits than its factorization.

3243253644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16527 (or 16522 counting only the distinct ones).

The product of its digits is 207360, while the sum is 36.

The square root of 3243253644 is about 56949.5710607200. The cubic root of 3243253644 is about 1480.2223984024. Note that the first 3 decimals are identical.

The spelling of 3243253644 in words is "three billion, two hundred forty-three million, two hundred fifty-three thousand, six hundred forty-four".