138929226 has 16 divisors (see below), whose sum is σ = 278334144. Its totient is φ = 46230464.

The previous prime is 138929213. The next prime is 138929243. The reversal of 138929226 is 622929831.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15966 + ... + 23081.

It is an arithmetic number, because the mean of its divisors is an integer number (17395884).

Almost surely, 2^138929226 is an apocalyptic number.

138929226 is an abundant number, since it is smaller than the sum of its proper divisors (139404918).

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

138929226 is a wasteful number, since it uses less digits than its factorization.

138929226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39645.

The product of its digits is 93312, while the sum is 42.

The square root of 138929226 is about 11786.8242542256. The cubic root of 138929226 is about 517.9222141861.

The spelling of 138929226 in words is "one hundred thirty-eight million, nine hundred twenty-nine thousand, two hundred twenty-six".