8040840 has 64 divisors (see below), whose sum is σ = 24788160. Its totient is φ = 2085120.

The previous prime is 8040839. The next prime is 8040853. The reversal of 8040840 is 480408.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 8040840.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3535 + ... + 5345.

It is an arithmetic number, because the mean of its divisors is an integer number (387315).

Almost surely, 2^8040840 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 8040840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12394080).

8040840 is an abundant number, since it is smaller than the sum of its proper divisors (16747320).

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

8040840 is a wasteful number, since it uses less digits than its factorization.

8040840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1862 (or 1858 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

The square root of 8040840 is about 2835.6374944622. The cubic root of 8040840 is about 200.3397558364.

The spelling of 8040840 in words is "eight million, forty thousand, eight hundred forty".