13911138 has 24 divisors (see below), whose sum is σ = 30654000. Its totient is φ = 4558104.

The previous prime is 13911137. The next prime is 13911193. The reversal of 13911138 is 83111931.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (13911133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5488 + ... + 7611.

It is an arithmetic number, because the mean of its divisors is an integer number (1277250).

Almost surely, 2^13911138 is an apocalyptic number.

13911138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13911138 is an abundant number, since it is smaller than the sum of its proper divisors (16742862).

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

13911138 is a wasteful number, since it uses less digits than its factorization.

13911138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13166 (or 13163 counting only the distinct ones).

The product of its digits is 648, while the sum is 27.

The square root of 13911138 is about 3729.7637994919. The cubic root of 13911138 is about 240.5032149904.

The spelling of 13911138 in words is "thirteen million, nine hundred eleven thousand, one hundred thirty-eight".