13637972 has 24 divisors (see below), whose sum is σ = 25247040. Its totient is φ = 6428160.

The previous prime is 13637969. The next prime is 13637983. The reversal of 13637972 is 27973631.

It is a Smith number, since the sum of its digits (38) 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 (38).

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, 23348 + ... + 23924.

It is an arithmetic number, because the mean of its divisors is an integer number (1051960).

Almost surely, 2^13637972 is an apocalyptic number.

It is an amenable number.

13637972 is a deficient number, since it is larger than the sum of its proper divisors (11609068).

13637972 is a wasteful number, since it uses less digits than its factorization.

13637972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911 (or 909 counting only the distinct ones).

The product of its digits is 47628, while the sum is 38.

The square root of 13637972 is about 3692.9624964248. The cubic root of 13637972 is about 238.9185836372.

The spelling of 13637972 in words is "thirteen million, six hundred thirty-seven thousand, nine hundred seventy-two".