13631644 has 12 divisors (see below), whose sum is σ = 25690504. Its totient is φ = 6291504.

The previous prime is 13631641. The next prime is 13631659. The reversal of 13631644 is 44613631.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13631641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131022 + ... + 131125.

Almost surely, 2^13631644 is an apocalyptic number.

It is an amenable number.

13631644 is a deficient number, since it is larger than the sum of its proper divisors (12058860).

13631644 is a wasteful number, since it uses less digits than its factorization.

13631644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262164 (or 262162 counting only the distinct ones).

The product of its digits is 5184, while the sum is 28.

The square root of 13631644 is about 3692.1056322917. The cubic root of 13631644 is about 238.8816252904.

The spelling of 13631644 in words is "thirteen million, six hundred thirty-one thousand, six hundred forty-four".