108921408 has 112 divisors (see below), whose sum is σ = 300410880. Its totient is φ = 34804224.

The previous prime is 108921401. The next prime is 108921409. The reversal of 108921408 is 804129801.

It is not an unprimeable number, because it can be changed into a prime (108921401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 652141 + ... + 652307.

It is an arithmetic number, because the mean of its divisors is an integer number (2682240).

Almost surely, 2^108921408 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 108921408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150205440).

108921408 is an abundant number, since it is smaller than the sum of its proper divisors (191489472).

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

108921408 is a wasteful number, since it uses less digits than its factorization.

108921408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304 (or 294 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 108921408 is about 10436.5419560312. The cubic root of 108921408 is about 477.5707823398.

The spelling of 108921408 in words is "one hundred eight million, nine hundred twenty-one thousand, four hundred eight".