13918638 has 16 divisors (see below), whose sum is σ = 27882576. Its totient is φ = 4632000.

The previous prime is 13918633. The next prime is 13918649. The reversal of 13918638 is 83681931.

13918638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 13918596 and 13918605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13918633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3138 + ... + 6138.

It is an arithmetic number, because the mean of its divisors is an integer number (1742661).

Almost surely, 2^13918638 is an apocalyptic number.

13918638 is an abundant number, since it is smaller than the sum of its proper divisors (13963938).

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

13918638 is a wasteful number, since it uses less digits than its factorization.

13918638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3779.

The product of its digits is 31104, while the sum is 39.

The square root of 13918638 is about 3730.7690896114. The cubic root of 13918638 is about 240.5464285662.

The spelling of 13918638 in words is "thirteen million, nine hundred eighteen thousand, six hundred thirty-eight".