13508138 has 16 divisors (see below), whose sum is σ = 23504064. Its totient is φ = 5702400.

The previous prime is 13508137. The next prime is 13508161. The reversal of 13508138 is 83180531.

13508138 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

13508138 is strictly pandigital in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 13508138.

It is not an unprimeable number, because it can be changed into a prime (13508137) 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, 6263 + ... + 8138.

It is an arithmetic number, because the mean of its divisors is an integer number (1469004).

Almost surely, 2^13508138 is an apocalyptic number.

13508138 is a deficient number, since it is larger than the sum of its proper divisors (9995926).

13508138 is a wasteful number, since it uses less digits than its factorization.

13508138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14477.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 13508138 is about 3675.3418888588. The cubic root of 13508138 is about 238.1579936280.

Adding to 13508138 its reverse (83180531), we get a palindrome (96688669).

The spelling of 13508138 in words is "thirteen million, five hundred eight thousand, one hundred thirty-eight".