2204240 has 40 divisors (see below), whose sum is σ = 5222880. Its totient is φ = 864896.

The previous prime is 2204221. The next prime is 2204243. The reversal of 2204240 is 424022.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2204243) 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 in 7 ways as a sum of consecutive naturals, for example, 4487 + ... + 4953.

It is an arithmetic number, because the mean of its divisors is an integer number (130572).

2^2204240 is an apocalyptic number.

2204240 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 2204240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2611440).

2204240 is an abundant number, since it is smaller than the sum of its proper divisors (3018640).

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

2204240 is a wasteful number, since it uses less digits than its factorization.

2204240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539 (or 533 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 2204240 is about 1484.6683131259. The cubic root of 2204240 is about 130.1426442135.

Adding to 2204240 its reverse (424022), we get a palindrome (2628262).

The spelling of 2204240 in words is "two million, two hundred four thousand, two hundred forty".