138906516 has 48 divisors (see below), whose sum is σ = 376503680. Its totient is φ = 39035520.

The previous prime is 138906503. The next prime is 138906533. The reversal of 138906516 is 615609831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8431 + ... + 18678.

Almost surely, 2^138906516 is an apocalyptic number.

It is an amenable number.

138906516 is an abundant number, since it is smaller than the sum of its proper divisors (237597164).

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

138906516 is a wasteful number, since it uses less digits than its factorization.

138906516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27184 (or 27182 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 138906516 is about 11785.8608510367. The cubic root of 138906516 is about 517.8939920119.

The spelling of 138906516 in words is "one hundred thirty-eight million, nine hundred six thousand, five hundred sixteen".