138308 has 12 divisors (see below), whose sum is σ = 245952. Its totient is φ = 68040.

The previous prime is 138289. The next prime is 138311. The reversal of 138308 is 803831.

It is an unprimeable number.

138308 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41 + ... + 527.

It is an arithmetic number, because the mean of its divisors is an integer number (20496).

2¹³⁸³⁰⁸ is an apocalyptic number.

It is an amenable number.

138308 is a deficient number, since it is larger than the sum of its proper divisors (107644).

138308 is a wasteful number, since it uses less digits than its factorization.

138308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562 (or 560 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 138308 is about 371.8978354333. The cubic root of 138308 is about 51.7149092705.

The spelling of 138308 in words is "one hundred thirty-eight thousand, three hundred eight".