2223640 has 32 divisors (see below), whose sum is σ = 5222880. Its totient is φ = 850432.

The previous prime is 2223631. The next prime is 2223671. The reversal of 2223640 is 463222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 289 + ... + 2128.

It is an arithmetic number, because the mean of its divisors is an integer number (163215).

2^2223640 is an apocalyptic number.

2223640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2223640 is an abundant number, since it is smaller than the sum of its proper divisors (2999240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2223640 is a wasteful number, since it uses less digits than its factorization.

2223640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2451 (or 2447 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 2223640 is about 1491.1874462991. The cubic root of 2223640 is about 130.5233342008.

Adding to 2223640 its reverse (463222), we get a palindrome (2686862).

The spelling of 2223640 in words is "two million, two hundred twenty-three thousand, six hundred forty".