13638974 has 8 divisors (see below), whose sum is σ = 20577240. Its totient is φ = 6779896.

The previous prime is 13638943. The next prime is 13638991. The reversal of 13638974 is 47983631.

13638974 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×13638974² = 372043223545352, 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 3 ways as a sum of consecutive naturals, for example, 19364 + ... + 20055.

It is an arithmetic number, because the mean of its divisors is an integer number (2572155).

Almost surely, 2^13638974 is an apocalyptic number.

13638974 is a deficient number, since it is larger than the sum of its proper divisors (6938266).

13638974 is a wasteful number, since it uses less digits than its factorization.

13638974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39594.

The product of its digits is 108864, while the sum is 41.

The square root of 13638974 is about 3693.0981573741. The cubic root of 13638974 is about 238.9244347163.

The spelling of 13638974 in words is "thirteen million, six hundred thirty-eight thousand, nine hundred seventy-four".