2782863 has 8 divisors (see below), whose sum is σ = 4122800. Its totient is φ = 1855224.

The previous prime is 2782861. The next prime is 2782877. The reversal of 2782863 is 3682872.

It is a happy number.

It is not a de Polignac number, because 2782863 - 2¹ = 2782861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2782861) 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 7 ways as a sum of consecutive naturals, for example, 51508 + ... + 51561.

It is an arithmetic number, because the mean of its divisors is an integer number (515350).

2^2782863 is an apocalyptic number.

2782863 is a deficient number, since it is larger than the sum of its proper divisors (1339937).

2782863 is a wasteful number, since it uses less digits than its factorization.

2782863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103078 (or 103072 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 2782863 is about 1668.1915357656. The cubic root of 2782863 is about 140.6578394417.

Subtracting 2782863 from its reverse (3682872), we obtain a palindrome (900009).

The spelling of 2782863 in words is "two million, seven hundred eighty-two thousand, eight hundred sixty-three".