138764312 has 16 divisors (see below), whose sum is σ = 260587800. Its totient is φ = 69274240.

The previous prime is 138764309. The next prime is 138764357. The reversal of 138764312 is 213467831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7889 + ... + 18432.

Almost surely, 2^138764312 is an apocalyptic number.

It is an amenable number.

138764312 is a deficient number, since it is larger than the sum of its proper divisors (121823488).

138764312 is a wasteful number, since it uses less digits than its factorization.

138764312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26986 (or 26982 counting only the distinct ones).

The product of its digits is 24192, while the sum is 35.

The square root of 138764312 is about 11779.8264842908. The cubic root of 138764312 is about 517.7172022656.

The spelling of 138764312 in words is "one hundred thirty-eight million, seven hundred sixty-four thousand, three hundred twelve".