13638682 has 4 divisors (see below), whose sum is σ = 20458026. Its totient is φ = 6819340.

The previous prime is 13638679. The next prime is 13638707. The reversal of 13638682 is 28683631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28683631 = 1229 ⋅23339.

It can be written as a sum of positive squares in only one way, i.e., 8934121 + 4704561 = 2989^2 + 2169^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3409669 + ... + 3409672.

Almost surely, 2^13638682 is an apocalyptic number.

13638682 is a deficient number, since it is larger than the sum of its proper divisors (6819344).

13638682 is an equidigital number, since it uses as much as digits as its factorization.

13638682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6819343.

The product of its digits is 41472, while the sum is 37.

The square root of 13638682 is about 3693.0586239593. The cubic root of 13638682 is about 238.9227296410.

The spelling of 13638682 in words is "thirteen million, six hundred thirty-eight thousand, six hundred eighty-two".