2805856 has 12 divisors (see below), whose sum is σ = 5524092. Its totient is φ = 1402912.

The previous prime is 2805851. The next prime is 2805899. The reversal of 2805856 is 6585082.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2805851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43810 + ... + 43873.

It is an arithmetic number, because the mean of its divisors is an integer number (460341).

2^2805856 is an apocalyptic number.

It is an amenable number.

2805856 is a deficient number, since it is larger than the sum of its proper divisors (2718236).

2805856 is an equidigital number, since it uses as much as digits as its factorization.

2805856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87693 (or 87685 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 34.

The square root of 2805856 is about 1675.0689538046. The cubic root of 2805856 is about 141.0441656993.

The spelling of 2805856 in words is "two million, eight hundred five thousand, eight hundred fifty-six".