138381226 has 4 divisors (see below), whose sum is σ = 207571842. Its totient is φ = 69190612.

The previous prime is 138381223. The next prime is 138381233. The reversal of 138381226 is 622183831.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 138039001 + 342225 = 11749^2 + 585^2 .

It is a junction number, because it is equal to n+sod(n) for n = 138381191 and 138381200.

It is not an unprimeable number, because it can be changed into a prime (138381223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34595305 + ... + 34595308.

Almost surely, 2^138381226 is an apocalyptic number.

138381226 is a deficient number, since it is larger than the sum of its proper divisors (69190616).

138381226 is an equidigital number, since it uses as much as digits as its factorization.

138381226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69190615.

The product of its digits is 13824, while the sum is 34.

The square root of 138381226 is about 11763.5549898829. The cubic root of 138381226 is about 517.2403433396.

The spelling of 138381226 in words is "one hundred thirty-eight million, three hundred eighty-one thousand, two hundred twenty-six".