2805823 has 4 divisors (see below), whose sum is σ = 2833168. Its totient is φ = 2778480.

The previous prime is 2805809. The next prime is 2805827. The reversal of 2805823 is 3285082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2805823 - 2⁵ = 2805791 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2805791 and 2805800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2805827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13518 + ... + 13723.

It is an arithmetic number, because the mean of its divisors is an integer number (708292).

2^2805823 is an apocalyptic number.

2805823 is a deficient number, since it is larger than the sum of its proper divisors (27345).

2805823 is a wasteful number, since it uses less digits than its factorization.

2805823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27344.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 2805823 is about 1675.0591034349. The cubic root of 2805823 is about 141.0436127515.

The spelling of 2805823 in words is "two million, eight hundred five thousand, eight hundred twenty-three".