136539138 has 32 divisors (see below), whose sum is σ = 290464704. Its totient is φ = 42639872.

The previous prime is 136539133. The next prime is 136539181. The reversal of 136539138 is 831935631.

It is a junction number, because it is equal to n+sod(n) for n = 136539096 and 136539105.

It is not an unprimeable number, because it can be changed into a prime (136539133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20206 + ... + 26102.

It is an arithmetic number, because the mean of its divisors is an integer number (9077022).

Almost surely, 2^136539138 is an apocalyptic number.

136539138 is an abundant number, since it is smaller than the sum of its proper divisors (153925566).

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

136539138 is a wasteful number, since it uses less digits than its factorization.

136539138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6146.

The product of its digits is 58320, while the sum is 39.

The square root of 136539138 is about 11684.9962772780. The cubic root of 136539138 is about 514.9349690092.

It can be divided in two parts, 13653 and 9138, that added together give a triangular number (22791 = T₂₁₃).

The spelling of 136539138 in words is "one hundred thirty-six million, five hundred thirty-nine thousand, one hundred thirty-eight".