2820944 has 40 divisors (see below), whose sum is σ = 6338880. Its totient is φ = 1191168.

The previous prime is 2820943. The next prime is 2820947. The reversal of 2820944 is 4490282.

It is a super-2 number, since 2×2820944² = 15915450102272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2820941) 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, 9827 + ... + 10109.

It is an arithmetic number, because the mean of its divisors is an integer number (158472).

2^2820944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2820944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3169440).

2820944 is an abundant number, since it is smaller than the sum of its proper divisors (3517936).

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

2820944 is a wasteful number, since it uses less digits than its factorization.

2820944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387 (or 381 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 2820944 is about 1679.5666107660. The cubic root of 2820944 is about 141.2965273408.

The spelling of 2820944 in words is "two million, eight hundred twenty thousand, nine hundred forty-four".