138836626 has 16 divisors (see below), whose sum is σ = 209805408. Its totient is φ = 68904000.

The previous prime is 138836623. The next prime is 138836639. The reversal of 138836626 is 626638831.

It is not an unprimeable number, because it can be changed into a prime (138836623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265201 + ... + 265723.

It is an arithmetic number, because the mean of its divisors is an integer number (13112838).

Almost surely, 2^138836626 is an apocalyptic number.

138836626 is a deficient number, since it is larger than the sum of its proper divisors (70968782).

138836626 is a wasteful number, since it uses less digits than its factorization.

138836626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257.

The product of its digits is 248832, while the sum is 43.

The square root of 138836626 is about 11782.8954845573. The cubic root of 138836626 is about 517.8071189974.

The spelling of 138836626 in words is "one hundred thirty-eight million, eight hundred thirty-six thousand, six hundred twenty-six".