2799866 has 8 divisors (see below), whose sum is σ = 4446900. Its totient is φ = 1317568.

The previous prime is 2799857. The next prime is 2799871. The reversal of 2799866 is 6689972.

It can be written as a sum of positive squares in 2 ways, for example, as 2627641 + 172225 = 1621^2 + 415^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2799866.

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 in 3 ways as a sum of consecutive naturals, for example, 41141 + ... + 41208.

2^2799866 is an apocalyptic number.

2799866 is a deficient number, since it is larger than the sum of its proper divisors (1647034).

2799866 is a wasteful number, since it uses less digits than its factorization.

2799866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82368.

The product of its digits is 326592, while the sum is 47.

The square root of 2799866 is about 1673.2800124307. The cubic root of 2799866 is about 140.9437261815.

The spelling of 2799866 in words is "two million, seven hundred ninety-nine thousand, eight hundred sixty-six".