2223440 has 20 divisors (see below), whose sum is σ = 5169684. Its totient is φ = 889344.

The previous prime is 2223421. The next prime is 2223443. The reversal of 2223440 is 443222.

It can be written as a sum of positive squares in 2 ways, for example, as 341056 + 1882384 = 584^2 + 1372^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2223443) 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, 13817 + ... + 13976.

2^2223440 is an apocalyptic number.

2223440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2223440 is an abundant number, since it is smaller than the sum of its proper divisors (2946244).

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

2223440 is a wasteful number, since it uses less digits than its factorization.

2223440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27806 (or 27800 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 2223440 is about 1491.1203841407. The cubic root of 2223440 is about 130.5194208801.

Adding to 2223440 its reverse (443222), we get a palindrome (2666662).

The spelling of 2223440 in words is "two million, two hundred twenty-three thousand, four hundred forty".