138131268 has 24 divisors (see below), whose sum is σ = 351607200. Its totient is φ = 41857920.

The previous prime is 138131251. The next prime is 138131291. The reversal of 138131268 is 862131831.

138131268 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 Harshad number since it is a multiple of its sum of digits (33).

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, 523093 + ... + 523356.

It is an arithmetic number, because the mean of its divisors is an integer number (14650300).

Almost surely, 2^138131268 is an apocalyptic number.

It is an amenable number.

138131268 is an abundant number, since it is smaller than the sum of its proper divisors (213475932).

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

138131268 is a wasteful number, since it uses less digits than its factorization.

138131268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046467 (or 1046465 counting only the distinct ones).

The product of its digits is 6912, while the sum is 33.

The square root of 138131268 is about 11752.9259335708. The cubic root of 138131268 is about 516.9287252389.

The spelling of 138131268 in words is "one hundred thirty-eight million, one hundred thirty-one thousand, two hundred sixty-eight".