138108036 has 96 divisors (see below), whose sum is σ = 377395200. Its totient is φ = 38862720.

The previous prime is 138108023. The next prime is 138108053. The reversal of 138108036 is 630801831.

It is a junction number, because it is equal to n+sod(n) for n = 138107994 and 138108012.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 132405 + ... + 133443.

It is an arithmetic number, because the mean of its divisors is an integer number (3931200).

Almost surely, 2^138108036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138108036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188697600).

138108036 is an abundant number, since it is smaller than the sum of its proper divisors (239287164).

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

138108036 is a wasteful number, since it uses less digits than its factorization.

138108036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129 (or 1127 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 138108036 is about 11751.9375423800. The cubic root of 138108036 is about 516.8997432383.

Adding to 138108036 its reverse (630801831), we get a palindrome (768909867).

The spelling of 138108036 in words is "one hundred thirty-eight million, one hundred eight thousand, thirty-six".