2812839 has 4 divisors (see below), whose sum is σ = 3750456. Its totient is φ = 1875224.

The previous prime is 2812829. The next prime is 2812853. The reversal of 2812839 is 9382182.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2812839 - 2⁸ = 2812583 is a prime.

It is a D-number.

2812839 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2812819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 468804 + ... + 468809.

It is an arithmetic number, because the mean of its divisors is an integer number (937614).

2^2812839 is an apocalyptic number.

2812839 is a deficient number, since it is larger than the sum of its proper divisors (937617).

2812839 is an equidigital number, since it uses as much as digits as its factorization.

2812839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937616.

The product of its digits is 6912, while the sum is 33.

The square root of 2812839 is about 1677.1520503520. The cubic root of 2812839 is about 141.1610754148.

The spelling of 2812839 in words is "two million, eight hundred twelve thousand, eight hundred thirty-nine".