138368726 has 16 divisors (see below), whose sum is σ = 212283504. Its totient is φ = 67624704.

The previous prime is 138368723. The next prime is 138368753. The reversal of 138368726 is 627863831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138368723) 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, 12305 + ... + 20691.

It is an arithmetic number, because the mean of its divisors is an integer number (13267719).

Almost surely, 2^138368726 is an apocalyptic number.

138368726 is a deficient number, since it is larger than the sum of its proper divisors (73914778).

138368726 is a wasteful number, since it uses less digits than its factorization.

138368726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8575.

The product of its digits is 290304, while the sum is 44.

The square root of 138368726 is about 11763.0236759092. The cubic root of 138368726 is about 517.2247687342.

The spelling of 138368726 in words is "one hundred thirty-eight million, three hundred sixty-eight thousand, seven hundred twenty-six".