2223840 has 96 divisors (see below), whose sum is σ = 7239456. Its totient is φ = 573440.

The previous prime is 2223839. The next prime is 2223841. The reversal of 2223840 is 483222.

2223840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2223839) and next prime (2223841).

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2223841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19624 + ... + 19736.

It is an arithmetic number, because the mean of its divisors is an integer number (75411).

2^2223840 is an apocalyptic number.

2223840 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 2223840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3619728).

2223840 is an abundant number, since it is smaller than the sum of its proper divisors (5015616).

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

2223840 is a wasteful number, since it uses less digits than its factorization.

2223840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 2223840 is about 1491.2545054416. The cubic root of 2223840 is about 130.5272472869.

The spelling of 2223840 in words is "two million, two hundred twenty-three thousand, eight hundred forty".