138501208 has 16 divisors (see below), whose sum is σ = 260540280. Its totient is φ = 69023808.

The previous prime is 138501197. The next prime is 138501229. The reversal of 138501208 is 802105831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25741 + ... + 30652.

Almost surely, 2^138501208 is an apocalyptic number.

It is an amenable number.

138501208 is a deficient number, since it is larger than the sum of its proper divisors (122039072).

138501208 is a wasteful number, since it uses less digits than its factorization.

138501208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56706 (or 56702 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 138501208 is about 11768.6536188300. The cubic root of 138501208 is about 517.3897894393.

The spelling of 138501208 in words is "one hundred thirty-eight million, five hundred one thousand, two hundred eight".