2805993 has 12 divisors (see below), whose sum is σ = 4084080. Its totient is φ = 1856376.

The previous prime is 2805989. The next prime is 2806007. The reversal of 2805993 is 3995082.

2805993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2805993 - 2² = 2805989 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2805923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130 + ... + 2372.

It is an arithmetic number, because the mean of its divisors is an integer number (340340).

2^2805993 is an apocalyptic number.

It is an amenable number.

2805993 is a deficient number, since it is larger than the sum of its proper divisors (1278087).

2805993 is a wasteful number, since it uses less digits than its factorization.

2805993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2388 (or 2385 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 2805993 is about 1675.1098471444. The cubic root of 2805993 is about 141.0464612242.

The spelling of 2805993 in words is "two million, eight hundred five thousand, nine hundred ninety-three".