13688556 has 48 divisors (see below), whose sum is σ = 36933120. Its totient is φ = 3864960.

The previous prime is 13688539. The next prime is 13688561. The reversal of 13688556 is 65588631.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6561 + ... + 8391.

It is an arithmetic number, because the mean of its divisors is an integer number (769440).

Almost surely, 2^13688556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13688556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18466560).

13688556 is an abundant number, since it is smaller than the sum of its proper divisors (23244564).

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

13688556 is a wasteful number, since it uses less digits than its factorization.

13688556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1934 (or 1932 counting only the distinct ones).

The product of its digits is 172800, while the sum is 42.

The square root of 13688556 is about 3699.8048597190. The cubic root of 13688556 is about 239.2136066428.

The spelling of 13688556 in words is "thirteen million, six hundred eighty-eight thousand, five hundred fifty-six".