2640224 has 12 divisors (see below), whose sum is σ = 5198004. Its totient is φ = 1320096.

The previous prime is 2640217. The next prime is 2640227. The reversal of 2640224 is 4220462.

It is a junction number, because it is equal to n+sod(n) for n = 2640196 and 2640205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640227) by changing a digit.

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 as a sum of consecutive naturals, namely, 41222 + ... + 41285.

It is an arithmetic number, because the mean of its divisors is an integer number (433167).

2^2640224 is an apocalyptic number.

It is an amenable number.

2640224 is a deficient number, since it is larger than the sum of its proper divisors (2557780).

2640224 is an equidigital number, since it uses as much as digits as its factorization.

2640224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82517 (or 82509 counting only the distinct ones).

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

The square root of 2640224 is about 1624.8766107000. The cubic root of 2640224 is about 138.2123734159.

Adding to 2640224 its reverse (4220462), we get a palindrome (6860686).

The spelling of 2640224 in words is "two million, six hundred forty thousand, two hundred twenty-four".