2806839 has 16 divisors (see below), whose sum is σ = 4752640. Its totient is φ = 1603800.

The previous prime is 2806829. The next prime is 2806847. The reversal of 2806839 is 9386082.

It is not a de Polignac number, because 2806839 - 2⁷ = 2806711 is a prime.

It is a Duffinian number.

2806839 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2806829) 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, 7237 + ... + 7614.

It is an arithmetic number, because the mean of its divisors is an integer number (297040).

2^2806839 is an apocalyptic number.

2806839 is a deficient number, since it is larger than the sum of its proper divisors (1945801).

2806839 is a wasteful number, since it uses less digits than its factorization.

2806839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14867 (or 14861 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 2806839 is about 1675.3623488667. The cubic root of 2806839 is about 141.0606348537.

The spelling of 2806839 in words is "two million, eight hundred six thousand, eight hundred thirty-nine".