2205856 has 24 divisors (see below), whose sum is σ = 4494420. Its totient is φ = 1064448.

The previous prime is 2205839. The next prime is 2205883. The reversal of 2205856 is 6585022.

It can be written as a sum of positive squares in 2 ways, for example, as 2202256 + 3600 = 1484^2 + 60^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261 + ... + 2116.

2^2205856 is an apocalyptic number.

It is an amenable number.

2205856 is an abundant number, since it is smaller than the sum of its proper divisors (2288564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2205856 is a wasteful number, since it uses less digits than its factorization.

2205856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2416 (or 2408 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 2205856 is about 1485.2124427165. The cubic root of 2205856 is about 130.1744403789.

The spelling of 2205856 in words is "two million, two hundred five thousand, eight hundred fifty-six".