108639844 has 36 divisors (see below), whose sum is σ = 200408124. Its totient is φ = 51492672.

The previous prime is 108639823. The next prime is 108639847. The reversal of 108639844 is 448936801.

It can be written as a sum of positive squares in 2 ways, for example, as 86266944 + 22372900 = 9288^2 + 4730^2 .

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a self number, because there is not a number n which added to its sum of digits gives 108639844.

It is not an unprimeable number, because it can be changed into a prime (108639847) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 273454 + ... + 273850.

Almost surely, 2^108639844 is an apocalyptic number.

It is an amenable number.

108639844 is a deficient number, since it is larger than the sum of its proper divisors (91768280).

108639844 is a wasteful number, since it uses less digits than its factorization.

108639844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524 (or 479 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 108639844 is about 10423.0438932204. The cubic root of 108639844 is about 477.1589172611.

The spelling of 108639844 in words is "one hundred eight million, six hundred thirty-nine thousand, eight hundred forty-four".