108091908 has 120 divisors (see below), whose sum is σ = 295975680. Its totient is φ = 34369920.

The previous prime is 108091877. The next prime is 108091909. The reversal of 108091908 is 809190801.

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

It is not an unprimeable number, because it can be changed into a prime (108091909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1049385 + ... + 1049487.

It is an arithmetic number, because the mean of its divisors is an integer number (2466464).

Almost surely, 2^108091908 is an apocalyptic number.

108091908 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 108091908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147987840).

108091908 is an abundant number, since it is smaller than the sum of its proper divisors (187883772).

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

108091908 is a wasteful number, since it uses less digits than its factorization.

108091908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 108091908 is about 10396.7258307604. The cubic root of 108091908 is about 476.3553651182.

The spelling of 108091908 in words is "one hundred eight million, ninety-one thousand, nine hundred eight".