138801168 has 80 divisors (see below), whose sum is σ = 434644800. Its totient is φ = 42059520.

The previous prime is 138801151. The next prime is 138801191. The reversal of 138801168 is 861108831.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9853 + ... + 19356.

It is an arithmetic number, because the mean of its divisors is an integer number (5433060).

Almost surely, 2^138801168 is an apocalyptic number.

138801168 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

138801168 is an abundant number, since it is smaller than the sum of its proper divisors (295843632).

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

138801168 is a wasteful number, since it uses less digits than its factorization.

138801168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29237 (or 29225 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 138801168 is about 11781.3907498224. The cubic root of 138801168 is about 517.7630336850.

Adding to 138801168 its reverse (861108831), we get a palindrome (999909999).

The spelling of 138801168 in words is "one hundred thirty-eight million, eight hundred one thousand, one hundred sixty-eight".