136808138 has 16 divisors (see below), whose sum is σ = 215892000. Its totient is φ = 64924272.

The previous prime is 136808137. The next prime is 136808201. The reversal of 136808138 is 831808631.

It is not an unprimeable number, because it can be changed into a prime (136808131) 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, 16568 + ... + 23411.

It is an arithmetic number, because the mean of its divisors is an integer number (13493250).

Almost surely, 2^136808138 is an apocalyptic number.

136808138 is a deficient number, since it is larger than the sum of its proper divisors (79083862).

136808138 is a wasteful number, since it uses less digits than its factorization.

136808138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40069.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 136808138 is about 11696.5011007566. The cubic root of 136808138 is about 515.2729103064.

The spelling of 136808138 in words is "one hundred thirty-six million, eight hundred eight thousand, one hundred thirty-eight".