13816138 has 24 divisors (see below), whose sum is σ = 25528932. Its totient is φ = 5572224.

The previous prime is 13816081. The next prime is 13816163. The reversal of 13816138 is 83161831.

It can be written as a sum of positive squares in 2 ways, for example, as 13816089 + 49 = 3717^2 + 7^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2481 + ... + 5812.

Almost surely, 2^13816138 is an apocalyptic number.

13816138 is a deficient number, since it is larger than the sum of its proper divisors (11712794).

13816138 is a wasteful number, since it uses less digits than its factorization.

13816138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8326 (or 8319 counting only the distinct ones).

The product of its digits is 3456, while the sum is 31.

The square root of 13816138 is about 3717.0065913313. The cubic root of 13816138 is about 239.9544936869.

Adding to 13816138 its reverse (83161831), we get a palindrome (96977969).

The spelling of 13816138 in words is "thirteen million, eight hundred sixteen thousand, one hundred thirty-eight".