13688244 has 24 divisors (see below), whose sum is σ = 35488320. Its totient is φ = 4562712.

The previous prime is 13688239. The next prime is 13688249. The reversal of 13688244 is 44288631.

It is an interprime number because it is at equal distance from previous prime (13688239) and next prime (13688249).

It is a Smith number, since the sum of its digits (36) 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 (36).

It is a junction number, because it is equal to n+sod(n) for n = 13688199 and 13688208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13688249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63264 + ... + 63479.

It is an arithmetic number, because the mean of its divisors is an integer number (1478680).

Almost surely, 2^13688244 is an apocalyptic number.

It is an amenable number.

13688244 is an abundant number, since it is smaller than the sum of its proper divisors (21800076).

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

13688244 is a wasteful number, since it uses less digits than its factorization.

13688244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126756 (or 126748 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 13688244 is about 3699.7626950928. The cubic root of 13688244 is about 239.2117891827.

The spelling of 13688244 in words is "thirteen million, six hundred eighty-eight thousand, two hundred forty-four".