2798566 has 4 divisors (see below), whose sum is σ = 4197852. Its totient is φ = 1399282.

The previous prime is 2798539. The next prime is 2798597. The reversal of 2798566 is 6658972.

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

It is a congruent number.

It is an unprimeable number.

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, 699640 + ... + 699643.

It is an arithmetic number, because the mean of its divisors is an integer number (1049463).

2^2798566 is an apocalyptic number.

2798566 is a deficient number, since it is larger than the sum of its proper divisors (1399286).

2798566 is a wasteful number, since it uses less digits than its factorization.

2798566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399285.

The product of its digits is 181440, while the sum is 43.

The square root of 2798566 is about 1672.8915087357. The cubic root of 2798566 is about 140.9219090411.

It can be divided in two parts, 2798 and 566, that added together give a square (3364 = 58²).

The spelling of 2798566 in words is "two million, seven hundred ninety-eight thousand, five hundred sixty-six".