138223626 has 16 divisors (see below), whose sum is σ = 276633984. Its totient is φ = 46043424.

The previous prime is 138223597. The next prime is 138223649. The reversal of 138223626 is 626322831.

It is a happy number.

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, 2991 + ... + 16893.

It is an arithmetic number, because the mean of its divisors is an integer number (17289624).

Almost surely, 2^138223626 is an apocalyptic number.

138223626 is an abundant number, since it is smaller than the sum of its proper divisors (138410358).

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

138223626 is a wasteful number, since it uses less digits than its factorization.

138223626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15565.

The product of its digits is 20736, while the sum is 33.

The square root of 138223626 is about 11756.8544262485. The cubic root of 138223626 is about 517.0439100368.

The spelling of 138223626 in words is "one hundred thirty-eight million, two hundred twenty-three thousand, six hundred twenty-six".