8040805 has 8 divisors (see below), whose sum is σ = 9664632. Its totient is φ = 6422208.

The previous prime is 8040793. The next prime is 8040817. The reversal of 8040805 is 5080408.

It is an interprime number because it is at equal distance from previous prime (8040793) and next prime (8040817).

It can be written as a sum of positive squares in 4 ways, for example, as 2461761 + 5579044 = 1569^2 + 2362^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8040805 - 2¹¹ = 8038757 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8040805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4179 + ... + 5791.

It is an arithmetic number, because the mean of its divisors is an integer number (1208079).

Almost surely, 2^8040805 is an apocalyptic number.

It is an amenable number.

8040805 is a deficient number, since it is larger than the sum of its proper divisors (1623827).

8040805 is a wasteful number, since it uses less digits than its factorization.

8040805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2615.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 8040805 is about 2835.6313230038. The cubic root of 8040805 is about 200.3394651577.

The spelling of 8040805 in words is "eight million, forty thousand, eight hundred five".