138317268 has 24 divisors (see below), whose sum is σ = 323025472. Its totient is φ = 46065024.

The previous prime is 138317251. The next prime is 138317273. The reversal of 138317268 is 862713831.

138317268 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11121 + ... + 20007.

Almost surely, 2^138317268 is an apocalyptic number.

It is an amenable number.

138317268 is an abundant number, since it is smaller than the sum of its proper divisors (184708204).

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

138317268 is a wasteful number, since it uses less digits than its factorization.

138317268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10191 (or 10189 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 138317268 is about 11760.8361947610. The cubic root of 138317268 is about 517.1606438101.

The spelling of 138317268 in words is "one hundred thirty-eight million, three hundred seventeen thousand, two hundred sixty-eight".