3644747216 has 20 divisors (see below), whose sum is σ = 7703670624. Its totient is φ = 1656703200.

The previous prime is 3644747213. The next prime is 3644747263. The reversal of 3644747216 is 6127474463.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3644747213) 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, 10354220 + ... + 10354571.

Almost surely, 2^3644747216 is an apocalyptic number.

It is an amenable number.

3644747216 is an abundant number, since it is smaller than the sum of its proper divisors (4058923408).

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

3644747216 is a wasteful number, since it uses less digits than its factorization.

3644747216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20708810 (or 20708804 counting only the distinct ones).

The product of its digits is 677376, while the sum is 44.

The square root of 3644747216 is about 60371.7418665389. The cubic root of 3644747216 is about 1538.9427746796.

The spelling of 3644747216 in words is "three billion, six hundred forty-four million, seven hundred forty-seven thousand, two hundred sixteen".