138936892 has 12 divisors (see below), whose sum is σ = 255936520. Its totient is φ = 65812176.

The previous prime is 138936877. The next prime is 138936893. The reversal of 138936892 is 298639831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138936893) 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, 913983 + ... + 914134.

Almost surely, 2^138936892 is an apocalyptic number.

It is an amenable number.

138936892 is a deficient number, since it is larger than the sum of its proper divisors (116999628).

138936892 is a wasteful number, since it uses less digits than its factorization.

138936892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1828140 (or 1828138 counting only the distinct ones).

The product of its digits is 559872, while the sum is 49.

The square root of 138936892 is about 11787.1494433557. The cubic root of 138936892 is about 517.9317401843.

The spelling of 138936892 in words is "one hundred thirty-eight million, nine hundred thirty-six thousand, eight hundred ninety-two".