8011805 has 4 divisors (see below), whose sum is σ = 9614172. Its totient is φ = 6409440.

The previous prime is 8011789. The next prime is 8011819. The reversal of 8011805 is 5081108.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1350244 + 6661561 = 1162^2 + 2581^2 .

It is not a de Polignac number, because 8011805 - 2⁴ = 8011789 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 801176 + ... + 801185.

It is an arithmetic number, because the mean of its divisors is an integer number (2403543).

Almost surely, 2^8011805 is an apocalyptic number.

It is an amenable number.

8011805 is a deficient number, since it is larger than the sum of its proper divisors (1602367).

8011805 is a wasteful number, since it uses less digits than its factorization.

8011805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1602366.

The product of its (nonzero) digits is 320, while the sum is 23.

The square root of 8011805 is about 2830.5132043501. The cubic root of 8011805 is about 200.0983266514.

The spelling of 8011805 in words is "eight million, eleven thousand, eight hundred five".