108801990 has 144 divisors (see below), whose sum is σ = 317195424. Its totient is φ = 25850880.

The previous prime is 108801967. The next prime is 108801991. The reversal of 108801990 is 99108801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108801991) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1056279 + ... + 1056381.

It is an arithmetic number, because the mean of its divisors is an integer number (2202746).

Almost surely, 2^108801990 is an apocalyptic number.

108801990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 108801990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158597712).

108801990 is an abundant number, since it is smaller than the sum of its proper divisors (208393434).

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

108801990 is a wasteful number, since it uses less digits than its factorization.

108801990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235 (or 221 counting only the distinct ones).

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

The square root of 108801990 is about 10430.8192391585. The cubic root of 108801990 is about 477.3961873311.

The spelling of 108801990 in words is "one hundred eight million, eight hundred one thousand, nine hundred ninety".