2022644 has 24 divisors (see below), whose sum is σ = 3860808. Its totient is φ = 921600.

The previous prime is 2022641. The next prime is 2022649. The reversal of 2022644 is 4462202.

2022644 is nontrivially palindromic in base 12.

It can be written as a sum of positive squares in 4 ways, for example, as 490000 + 1532644 = 700^2 + 1238^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2022641) 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, 4844 + ... + 5244.

It is an arithmetic number, because the mean of its divisors is an integer number (160867).

2^2022644 is an apocalyptic number.

It is an amenable number.

2022644 is a deficient number, since it is larger than the sum of its proper divisors (1838164).

2022644 is a wasteful number, since it uses less digits than its factorization.

2022644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515 (or 513 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 2022644 is about 1422.1968921355. The cubic root of 2022644 is about 126.4658158816.

Adding to 2022644 its reverse (4462202), we get a palindrome (6484846).

The spelling of 2022644 in words is "two million, twenty-two thousand, six hundred forty-four".