108139920 has 160 divisors (see below), whose sum is σ = 389975040. Its totient is φ = 24276480.

The previous prime is 108139909. The next prime is 108139939. The reversal of 108139920 is 29931801.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 98575 + ... + 99665.

It is an arithmetic number, because the mean of its divisors is an integer number (2437344).

Almost surely, 2^108139920 is an apocalyptic number.

108139920 is a gapful number since it is divisible by the number (10) 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 108139920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194987520).

108139920 is an abundant number, since it is smaller than the sum of its proper divisors (281835120).

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

108139920 is a wasteful number, since it uses less digits than its factorization.

108139920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173 (or 1167 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 108139920 is about 10399.0345705743. The cubic root of 108139920 is about 476.4258834663.

The spelling of 108139920 in words is "one hundred eight million, one hundred thirty-nine thousand, nine hundred twenty".