3643989744 has 40 divisors (see below), whose sum is σ = 9429588432. Its totient is φ = 1212605440.

The previous prime is 3643989737. The next prime is 3643989781. The reversal of 3643989744 is 4479893463.

It is a super-2 number, since 2×3643989744² = 26557322508754371072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35547 + ... + 92474.

Almost surely, 2^3643989744 is an apocalyptic number.

It is an amenable number.

3643989744 is an abundant number, since it is smaller than the sum of its proper divisors (5785598688).

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

3643989744 is a wasteful number, since it uses less digits than its factorization.

3643989744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128625 (or 128619 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 57.

The square root of 3643989744 is about 60365.4681419767. The cubic root of 3643989744 is about 1538.8361566934.

The spelling of 3643989744 in words is "three billion, six hundred forty-three million, nine hundred eighty-nine thousand, seven hundred forty-four".