138158626 has 16 divisors (see below), whose sum is σ = 221110560. Its totient is φ = 64517440.

The previous prime is 138158591. The next prime is 138158627. The reversal of 138158626 is 626851831.

It is not an unprimeable number, because it can be changed into a prime (138158627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11056 + ... + 19963.

It is an arithmetic number, because the mean of its divisors is an integer number (13819410).

Almost surely, 2^138158626 is an apocalyptic number.

138158626 is a deficient number, since it is larger than the sum of its proper divisors (82951934).

138158626 is a wasteful number, since it uses less digits than its factorization.

138158626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31169.

The product of its digits is 69120, while the sum is 40.

The square root of 138158626 is about 11754.0897563359. The cubic root of 138158626 is about 516.9628502726.

The spelling of 138158626 in words is "one hundred thirty-eight million, one hundred fifty-eight thousand, six hundred twenty-six".