108991044 has 72 divisors (see below), whose sum is σ = 283905440. Its totient is φ = 35240832.

The previous prime is 108991039. The next prime is 108991067. The reversal of 108991044 is 440199801.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 in 23 ways as a sum of consecutive naturals, for example, 175767 + ... + 176385.

Almost surely, 2^108991044 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 108991044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141952720).

108991044 is an abundant number, since it is smaller than the sum of its proper divisors (174914396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

108991044 is a wasteful number, since it uses less digits than its factorization.

108991044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769 (or 764 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 108991044 is about 10439.8775854892. The cubic root of 108991044 is about 477.6725347103.

The spelling of 108991044 in words is "one hundred eight million, nine hundred ninety-one thousand, forty-four".