2204816 has 20 divisors (see below), whose sum is σ = 4377324. Its totient is φ = 1075200.

The previous prime is 2204809. The next prime is 2204821. The reversal of 2204816 is 6184022.

It can be written as a sum of positive squares in 2 ways, for example, as 774400 + 1430416 = 880^2 + 1196^2 .

It is a super-2 number, since 2×2204816² = 9722427187712, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2204791 and 2204800.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1025 + ... + 2336.

2^2204816 is an apocalyptic number.

It is an amenable number.

2204816 is a deficient number, since it is larger than the sum of its proper divisors (2172508).

2204816 is a wasteful number, since it uses less digits than its factorization.

2204816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3410 (or 3404 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 2204816 is about 1484.8622831765. The cubic root of 2204816 is about 130.1539792820.

Adding to 2204816 its reverse (6184022), we get a palindrome (8388838).

The spelling of 2204816 in words is "two million, two hundred four thousand, eight hundred sixteen".