2840839 has 4 divisors (see below), whose sum is σ = 2870224. Its totient is φ = 2811456.

The previous prime is 2840801. The next prime is 2840857. The reversal of 2840839 is 9380482.

2840839 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2840839 - 2¹⁷ = 2709767 is a prime.

It is a super-3 number, since 3×2840839³ = 68779833339592529157, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2840039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14547 + ... + 14740.

It is an arithmetic number, because the mean of its divisors is an integer number (717556).

2^2840839 is an apocalyptic number.

2840839 is a deficient number, since it is larger than the sum of its proper divisors (29385).

2840839 is an equidigital number, since it uses as much as digits as its factorization.

2840839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29384.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 2840839 is about 1685.4788637061. The cubic root of 2840839 is about 141.6279189685.

The spelling of 2840839 in words is "two million, eight hundred forty thousand, eight hundred thirty-nine".