2806439 has 2 divisors, whose sum is σ = 2806440. Its totient is φ = 2806438.

The previous prime is 2806387. The next prime is 2806457. The reversal of 2806439 is 9346082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2806439 - 2²⁰ = 1757863 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2806459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1403219 + 1403220.

It is an arithmetic number, because the mean of its divisors is an integer number (1403220).

2^2806439 is an apocalyptic number.

2806439 is a deficient number, since it is larger than the sum of its proper divisors (1).

2806439 is an equidigital number, since it uses as much as digits as its factorization.

2806439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 2806439 is about 1675.2429674528. The cubic root of 2806439 is about 141.0539337290.

The spelling of 2806439 in words is "two million, eight hundred six thousand, four hundred thirty-nine".