13881788 has 12 divisors (see below), whose sum is σ = 25349520. Its totient is φ = 6639072.

The previous prime is 13881787. The next prime is 13881817. The reversal of 13881788 is 88718831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13881781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75353 + ... + 75536.

It is an arithmetic number, because the mean of its divisors is an integer number (2112460).

Almost surely, 2^13881788 is an apocalyptic number.

It is an amenable number.

13881788 is a deficient number, since it is larger than the sum of its proper divisors (11467732).

13881788 is a wasteful number, since it uses less digits than its factorization.

13881788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150916 (or 150914 counting only the distinct ones).

The product of its digits is 86016, while the sum is 44.

The square root of 13881788 is about 3725.8271564849. The cubic root of 13881788 is about 240.3339563855. Note that the first 3 decimals are identical.

The spelling of 13881788 in words is "thirteen million, eight hundred eighty-one thousand, seven hundred eighty-eight".