2820839 has 8 divisors (see below), whose sum is σ = 3237888. Its totient is φ = 2407320.

The previous prime is 2820833. The next prime is 2820863. The reversal of 2820839 is 9380282.

It is a happy number.

2820839 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2820839 - 2¹⁶ = 2755303 is a prime.

It is a Duffinian number.

2820839 is strictly pandigital in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2820833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1154 + ... + 2640.

It is an arithmetic number, because the mean of its divisors is an integer number (404736).

2^2820839 is an apocalyptic number.

2820839 is a deficient number, since it is larger than the sum of its proper divisors (417049).

2820839 is a wasteful number, since it uses less digits than its factorization.

2820839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1765.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 2820839 is about 1679.5353524115. The cubic root of 2820839 is about 141.2947742256.

The spelling of 2820839 in words is "two million, eight hundred twenty thousand, eight hundred thirty-nine".