8109990 has 96 divisors (see below), whose sum is σ = 25198560. Its totient is φ = 1850688.

The previous prime is 8109973. The next prime is 8110009. The reversal of 8109990 is 999018.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12924 + ... + 13536.

It is an arithmetic number, because the mean of its divisors is an integer number (262485).

Almost surely, 2^8109990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8109990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12599280).

8109990 is an abundant number, since it is smaller than the sum of its proper divisors (17088570).

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

8109990 is a wasteful number, since it uses less digits than its factorization.

8109990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643 (or 630 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 8109990 is about 2847.8044174416. The cubic root of 8109990 is about 200.9124145023.

The spelling of 8109990 in words is "eight million, one hundred nine thousand, nine hundred ninety".