2850805 has 4 divisors (see below), whose sum is σ = 3420972. Its totient is φ = 2280640.

The previous prime is 2850797. The next prime is 2850811. The reversal of 2850805 is 5080582.

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 654481 + 2196324 = 809^2 + 1482^2 .

It is not a de Polignac number, because 2850805 - 2³ = 2850797 is a prime.

It is an Ulam number.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 285076 + ... + 285085.

It is an arithmetic number, because the mean of its divisors is an integer number (855243).

2^2850805 is an apocalyptic number.

It is an amenable number.

2850805 is a deficient number, since it is larger than the sum of its proper divisors (570167).

2850805 is an equidigital number, since it uses as much as digits as its factorization.

2850805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570166.

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 2850805 is about 1688.4327052033. The cubic root of 2850805 is about 141.7933415218.

It can be divided in two parts, 2850 and 805, that added together give a triangular number (3655 = T₈₅).

The spelling of 2850805 in words is "two million, eight hundred fifty thousand, eight hundred five".