2782839 has 16 divisors (see below), whose sum is σ = 3999744. Its totient is φ = 1716000.

The previous prime is 2782789. The next prime is 2782841. The reversal of 2782839 is 9382872.

It is not a de Polignac number, because 2782839 - 2¹⁵ = 2750071 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2782797 and 2782806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2782859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1489 + ... + 2789.

It is an arithmetic number, because the mean of its divisors is an integer number (249984).

2^2782839 is an apocalyptic number.

2782839 is a deficient number, since it is larger than the sum of its proper divisors (1216905).

2782839 is a wasteful number, since it uses less digits than its factorization.

2782839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358.

The product of its digits is 48384, while the sum is 39.

The square root of 2782839 is about 1668.1843423315. The cubic root of 2782839 is about 140.6574350862.

The spelling of 2782839 in words is "two million, seven hundred eighty-two thousand, eight hundred thirty-nine".