138877226 has 16 divisors (see below), whose sum is σ = 212160384. Its totient is φ = 68169024.

The previous prime is 138877223. The next prime is 138877231. The reversal of 138877226 is 622778831.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (138877223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21311 + ... + 27053.

It is an arithmetic number, because the mean of its divisors is an integer number (13260024).

Almost surely, 2^138877226 is an apocalyptic number.

138877226 is a deficient number, since it is larger than the sum of its proper divisors (73283158).

138877226 is a wasteful number, since it uses less digits than its factorization.

138877226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5965.

The product of its digits is 225792, while the sum is 44.

The square root of 138877226 is about 11784.6181949183. The cubic root of 138877226 is about 517.8575881969.

The spelling of 138877226 in words is "one hundred thirty-eight million, eight hundred seventy-seven thousand, two hundred twenty-six".