138144108 has 24 divisors (see below), whose sum is σ = 341297712. Its totient is φ = 43339264.

The previous prime is 138144107. The next prime is 138144119. The reversal of 138144108 is 801441831.

It is not an unprimeable number, because it can be changed into a prime (138144101) 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, 338385 + ... + 338792.

It is an arithmetic number, because the mean of its divisors is an integer number (14220738).

Almost surely, 2^138144108 is an apocalyptic number.

It is an amenable number.

138144108 is an abundant number, since it is smaller than the sum of its proper divisors (203153604).

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

138144108 is a wasteful number, since it uses less digits than its factorization.

138144108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677201 (or 677199 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 138144108 is about 11753.4721678319. The cubic root of 138144108 is about 516.9447417891.

Adding to 138144108 its reverse (801441831), we get a palindrome (939585939).

The spelling of 138144108 in words is "one hundred thirty-eight million, one hundred forty-four thousand, one hundred eight".