138031368 has 16 divisors (see below), whose sum is σ = 345078480. Its totient is φ = 46010448.

The previous prime is 138031363. The next prime is 138031403. The reversal of 138031368 is 863130831.

It is a happy number.

138031368 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (138031363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2875630 + ... + 2875677.

It is an arithmetic number, because the mean of its divisors is an integer number (21567405).

Almost surely, 2^138031368 is an apocalyptic number.

It is an amenable number.

138031368 is an abundant number, since it is smaller than the sum of its proper divisors (207047112).

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

138031368 is a wasteful number, since it uses less digits than its factorization.

138031368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5751316 (or 5751312 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 138031368 is about 11748.6751593531. The cubic root of 138031368 is about 516.8040765749.

The spelling of 138031368 in words is "one hundred thirty-eight million, thirty-one thousand, three hundred sixty-eight".