108205138 has 8 divisors (see below), whose sum is σ = 163915020. Its totient is φ = 53566800.

The previous prime is 108205127. The next prime is 108205147. The reversal of 108205138 is 831502801.

It can be written as a sum of positive squares in 2 ways, for example, as 101666889 + 6538249 = 10083^2 + 2557^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 267633 + ... + 268036.

Almost surely, 2^108205138 is an apocalyptic number.

108205138 is a deficient number, since it is larger than the sum of its proper divisors (55709882).

108205138 is a wasteful number, since it uses less digits than its factorization.

108205138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535772.

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

The square root of 108205138 is about 10402.1698697916. The cubic root of 108205138 is about 476.5216399611.

Adding to 108205138 its reverse (831502801), we get a palindrome (939707939).

The spelling of 108205138 in words is "one hundred eight million, two hundred five thousand, one hundred thirty-eight".