2805399 has 6 divisors (see below), whose sum is σ = 4052256. Its totient is φ = 1870260.

The previous prime is 2805389. The next prime is 2805403. The reversal of 2805399 is 9935082.

It is not a de Polignac number, because 2805399 - 2⁵ = 2805367 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2805389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 155847 + ... + 155864.

It is an arithmetic number, because the mean of its divisors is an integer number (675376).

2^2805399 is an apocalyptic number.

2805399 is a deficient number, since it is larger than the sum of its proper divisors (1246857).

2805399 is a wasteful number, since it uses less digits than its factorization.

2805399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311717 (or 311714 counting only the distinct ones).

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

The square root of 2805399 is about 1674.9325359548. The cubic root of 2805399 is about 141.0365078244.

The spelling of 2805399 in words is "two million, eight hundred five thousand, three hundred ninety-nine".