2285809 has 12 divisors (see below), whose sum is σ = 2488500. Its totient is φ = 2096864.

The previous prime is 2285797. The next prime is 2285813. The reversal of 2285809 is 9085822.

It can be written as a sum of positive squares in 2 ways, for example, as 685584 + 1600225 = 828^2 + 1265^2 .

It is not a de Polignac number, because 2285809 - 2¹³ = 2277617 is a prime.

It is a Duffinian number.

2285809 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2285869) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15267 + ... + 15415.

It is an arithmetic number, because the mean of its divisors is an integer number (207375).

2^2285809 is an apocalyptic number.

2285809 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2285809 is a deficient number, since it is larger than the sum of its proper divisors (202691).

2285809 is a wasteful number, since it uses less digits than its factorization.

2285809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 2285809 is about 1511.8892155181. The cubic root of 2285809 is about 131.7285706523.

The spelling of 2285809 in words is "two million, two hundred eighty-five thousand, eight hundred nine".