2805806 has 16 divisors (see below), whose sum is σ = 4527360. Its totient is φ = 1299960.

The previous prime is 2805791. The next prime is 2805809. The reversal of 2805806 is 6085082.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2805809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1001 + ... + 2571.

It is an arithmetic number, because the mean of its divisors is an integer number (282960).

2^2805806 is an apocalyptic number.

2805806 is a deficient number, since it is larger than the sum of its proper divisors (1721554).

2805806 is a wasteful number, since it uses less digits than its factorization.

2805806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1639.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 2805806 is about 1675.0540289794. The cubic root of 2805806 is about 141.0433278980.

The spelling of 2805806 in words is "two million, eight hundred five thousand, eight hundred six".