13388856 has 48 divisors (see below), whose sum is σ = 36255960. Its totient is φ = 4118400.

The previous prime is 13388839. The next prime is 13388887. The reversal of 13388856 is 65888331.

It is a super-2 number, since 2×13388856² = 358522929977472, 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 11 ways as a sum of consecutive naturals, for example, 2406 + ... + 5706.

Almost surely, 2^13388856 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 13388856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18127980).

13388856 is an abundant number, since it is smaller than the sum of its proper divisors (22867104).

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

13388856 is a wasteful number, since it uses less digits than its factorization.

13388856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3336 (or 3319 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The square root of 13388856 is about 3659.0785725371. The cubic root of 13388856 is about 237.4549114776.

The spelling of 13388856 in words is "thirteen million, three hundred eighty-eight thousand, eight hundred fifty-six".