8105840 has 20 divisors (see below), whose sum is σ = 18846264. Its totient is φ = 3242304.

The previous prime is 8105813. The next prime is 8105869. The reversal of 8105840 is 485018.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50582 + ... + 50741.

Almost surely, 2^8105840 is an apocalyptic number.

8105840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8105840 is an abundant number, since it is smaller than the sum of its proper divisors (10740424).

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

8105840 is a wasteful number, since it uses less digits than its factorization.

8105840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101336 (or 101330 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 8105840 is about 2847.0756927065. The cubic root of 8105840 is about 200.8781387190.

The spelling of 8105840 in words is "eight million, one hundred five thousand, eight hundred forty".