2821842 has 48 divisors (see below), whose sum is σ = 6639360. Its totient is φ = 863136.

The previous prime is 2821831. The next prime is 2821849. The reversal of 2821842 is 2481282.

2821842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2821849) 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 23 ways as a sum of consecutive naturals, for example, 12543 + ... + 12765.

It is an arithmetic number, because the mean of its divisors is an integer number (138320).

2^2821842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2821842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3319680).

2821842 is an abundant number, since it is smaller than the sum of its proper divisors (3817518).

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

2821842 is a wasteful number, since it uses less digits than its factorization.

2821842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287 (or 284 counting only the distinct ones).

The product of its digits is 2048, while the sum is 27.

The square root of 2821842 is about 1679.8339203624. The cubic root of 2821842 is about 141.3115188732.

It can be divided in two parts, 2821 and 842, that added together give a palindrome (3663).

The spelling of 2821842 in words is "two million, eight hundred twenty-one thousand, eight hundred forty-two".