138361168 has 40 divisors (see below), whose sum is σ = 293106240. Its totient is φ = 62749440.

The previous prime is 138361133. The next prime is 138361189. The reversal of 138361168 is 861163831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147196 + ... + 148132.

It is an arithmetic number, because the mean of its divisors is an integer number (7327656).

Almost surely, 2^138361168 is an apocalyptic number.

It is an amenable number.

138361168 is an abundant number, since it is smaller than the sum of its proper divisors (154745072).

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

138361168 is a wasteful number, since it uses less digits than its factorization.

138361168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1795 (or 1789 counting only the distinct ones).

The product of its digits is 20736, while the sum is 37.

The square root of 138361168 is about 11762.7024105858. The cubic root of 138361168 is about 517.2153512498.

The spelling of 138361168 in words is "one hundred thirty-eight million, three hundred sixty-one thousand, one hundred sixty-eight".