138338306 has 16 divisors (see below), whose sum is σ = 215900160. Its totient is φ = 66407040.

The previous prime is 138338293. The next prime is 138338309. The reversal of 138338306 is 603833831.

It is not an unprimeable number, because it can be changed into a prime (138338309) 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, 911 + ... + 16658.

It is an arithmetic number, because the mean of its divisors is an integer number (13493760).

Almost surely, 2^138338306 is an apocalyptic number.

138338306 is a deficient number, since it is larger than the sum of its proper divisors (77561854).

138338306 is a wasteful number, since it uses less digits than its factorization.

138338306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17729.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 138338306 is about 11761.7305699459. The cubic root of 138338306 is about 517.1868624551.

The spelling of 138338306 in words is "one hundred thirty-eight million, three hundred thirty-eight thousand, three hundred six".