108639238 has 4 divisors (see below), whose sum is σ = 162958860. Its totient is φ = 54319618.

The previous prime is 108639187. The next prime is 108639247. The reversal of 108639238 is 832936801.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 108639238.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27159808 + ... + 27159811.

It is an arithmetic number, because the mean of its divisors is an integer number (40739715).

Almost surely, 2^108639238 is an apocalyptic number.

108639238 is a deficient number, since it is larger than the sum of its proper divisors (54319622).

108639238 is an equidigital number, since it uses as much as digits as its factorization.

108639238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54319621.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 108639238 is about 10423.0148229771. The cubic root of 108639238 is about 477.1580300518.

The spelling of 108639238 in words is "one hundred eight million, six hundred thirty-nine thousand, two hundred thirty-eight".