2808863 has 2 divisors, whose sum is σ = 2808864. Its totient is φ = 2808862.

The previous prime is 2808847. The next prime is 2808877. The reversal of 2808863 is 3688082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2808863 - 2⁴ = 2808847 is a prime.

It is a super-2 number, since 2×2808863² = 15779422705538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2808833) 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 as a sum of consecutive naturals, namely, 1404431 + 1404432.

It is an arithmetic number, because the mean of its divisors is an integer number (1404432).

2^2808863 is an apocalyptic number.

2808863 is a deficient number, since it is larger than the sum of its proper divisors (1).

2808863 is an equidigital number, since it uses as much as digits as its factorization.

2808863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 2808863 is about 1675.9662884438. The cubic root of 2808863 is about 141.0945327874.

The spelling of 2808863 in words is "two million, eight hundred eight thousand, eight hundred sixty-three".