108388920 has 128 divisors (see below), whose sum is σ = 345772800. Its totient is φ = 27104256.

The previous prime is 108388897. The next prime is 108388997. The reversal of 108388920 is 29883801.

It is a Cunningham number, because it is equal to 10411²-1.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 312187 + ... + 312533.

It is an arithmetic number, because the mean of its divisors is an integer number (2701350).

Almost surely, 2^108388920 is an apocalyptic number.

108388920 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 108388920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172886400).

108388920 is an abundant number, since it is smaller than the sum of its proper divisors (237383880).

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

108388920 is a wasteful number, since it uses less digits than its factorization.

108388920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517 (or 513 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 108388920 is about 10410.9999519739. Note that the first 4 decimals coincide. The cubic root of 108388920 is about 476.7912715359.

The spelling of 108388920 in words is "one hundred eight million, three hundred eighty-eight thousand, nine hundred twenty".