2203664 has 20 divisors (see below), whose sum is σ = 4370256. Its totient is φ = 1075872.

The previous prime is 2203661. The next prime is 2203673. The reversal of 2203664 is 4663022.

It is a super-2 number, since 2×2203664² = 9712270049792, which contains 22 as substring.

It is a Smith number, since the sum of its digits (23) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2203661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 914 + ... + 2289.

2^2203664 is an apocalyptic number.

It is an amenable number.

2203664 is a deficient number, since it is larger than the sum of its proper divisors (2166592).

2203664 is a wasteful number, since it uses less digits than its factorization.

2203664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3254 (or 3248 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 2203664 is about 1484.4743177300. The cubic root of 2203664 is about 130.1313071701.

Adding to 2203664 its reverse (4663022), we get a palindrome (6866686).

The spelling of 2203664 in words is "two million, two hundred three thousand, six hundred sixty-four".