224440 has 32 divisors (see below), whose sum is σ = 524160. Its totient is φ = 86400.

The previous prime is 224429. The next prime is 224443. The reversal of 224440 is 44422.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1150 + ... + 1330.

It is an arithmetic number, because the mean of its divisors is an integer number (16380).

2²²⁴⁴⁴⁰ is an apocalyptic number.

224440 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 224440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262080).

224440 is an abundant number, since it is smaller than the sum of its proper divisors (299720).

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

224440 is a wasteful number, since it uses less digits than its factorization.

224440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 224440 is about 473.7509894449. The cubic root of 224440 is about 60.7715182850.

Adding to 224440 its reverse (44422), we get a palindrome (268862).

It can be divided in two parts, 2 and 24440, that added together give a palindrome (24442).

The spelling of 224440 in words is "two hundred twenty-four thousand, four hundred forty", and thus it is an iban number.