2223240 has 64 divisors (see below), whose sum is σ = 6773760. Its totient is φ = 583680.

The previous prime is 2223233. The next prime is 2223253. The reversal of 2223240 is 423222.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11545 + ... + 11735.

It is an arithmetic number, because the mean of its divisors is an integer number (105840).

2^2223240 is an apocalyptic number.

2223240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2223240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3386880).

2223240 is an abundant number, since it is smaller than the sum of its proper divisors (4550520).

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

2223240 is a wasteful number, since it uses less digits than its factorization.

2223240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 298 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 2223240 is about 1491.0533189662. The cubic root of 2223240 is about 130.5155073247.

Adding to 2223240 its reverse (423222), we get a palindrome (2646462).

The spelling of 2223240 in words is "two million, two hundred twenty-three thousand, two hundred forty".