138606226 has 24 divisors (see below), whose sum is σ = 229148892. Its totient is φ = 62832000.

The previous prime is 138606191. The next prime is 138606227. The reversal of 138606226 is 622606831.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 135699201 + 2907025 = 11649^2 + 1705^2 .

It is a junction number, because it is equal to n+sod(n) for n = 138606191 and 138606200.

It is not an unprimeable number, because it can be changed into a prime (138606227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 144966 + ... + 145918.

Almost surely, 2^138606226 is an apocalyptic number.

138606226 is a deficient number, since it is larger than the sum of its proper divisors (90542666).

138606226 is a wasteful number, since it uses less digits than its factorization.

138606226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1578 (or 1567 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 138606226 is about 11773.1145411909. The cubic root of 138606226 is about 517.5205259971.

The spelling of 138606226 in words is "one hundred thirty-eight million, six hundred six thousand, two hundred twenty-six".