138706626 has 8 divisors (see below), whose sum is σ = 277413264. Its totient is φ = 46235540.

The previous prime is 138706613. The next prime is 138706627. The reversal of 138706626 is 626607831.

It is a sphenic number, since it is the product of 3 distinct primes.

138706626 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (138706627) 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, 11558880 + ... + 11558891.

It is an arithmetic number, because the mean of its divisors is an integer number (34676658).

Almost surely, 2^138706626 is an apocalyptic number.

138706626 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

138706626 is a wasteful number, since it uses less digits than its factorization.

138706626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23117776.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 138706626 is about 11777.3777217172. The cubic root of 138706626 is about 517.6454518915.

The spelling of 138706626 in words is "one hundred thirty-eight million, seven hundred six thousand, six hundred twenty-six".