2204644 has 12 divisors (see below), whose sum is σ = 4155004. Its totient is φ = 1017504.

The previous prime is 2204623. The next prime is 2204647. The reversal of 2204644 is 4464022.

It can be written as a sum of positive squares in 2 ways, for example, as 788544 + 1416100 = 888^2 + 1190^2 .

It is not an unprimeable number, because it can be changed into a prime (2204647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21147 + ... + 21250.

2^2204644 is an apocalyptic number.

It is an amenable number.

2204644 is a deficient number, since it is larger than the sum of its proper divisors (1950360).

2204644 is a wasteful number, since it uses less digits than its factorization.

2204644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42414 (or 42412 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 2204644 is about 1484.8043642177. The cubic root of 2204644 is about 130.1505947114.

Adding to 2204644 its reverse (4464022), we get a palindrome (6668666).

The spelling of 2204644 in words is "two million, two hundred four thousand, six hundred forty-four".