2821836 has 24 divisors (see below), whose sum is σ = 6645744. Its totient is φ = 931840.

The previous prime is 2821831. The next prime is 2821849. The reversal of 2821836 is 6381282.

2821836 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2821831) 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 7 ways as a sum of consecutive naturals, for example, 316 + ... + 2396.

It is an arithmetic number, because the mean of its divisors is an integer number (276906).

2^2821836 is an apocalyptic number.

It is an amenable number.

2821836 is an abundant number, since it is smaller than the sum of its proper divisors (3823908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2821836 is a wasteful number, since it uses less digits than its factorization.

2821836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2201 (or 2199 counting only the distinct ones).

The product of its digits is 4608, while the sum is 30.

The square root of 2821836 is about 1679.8321344706. The cubic root of 2821836 is about 141.3114187176.

The spelling of 2821836 in words is "two million, eight hundred twenty-one thousand, eight hundred thirty-six".