224240 has 20 divisors (see below), whose sum is σ = 521544. Its totient is φ = 89664.

The previous prime is 224239. The next prime is 224251. The reversal of 224240 is 42422.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1322 + ... + 1481.

2²²⁴²⁴⁰ is an apocalyptic number.

224240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

224240 is an abundant number, since it is smaller than the sum of its proper divisors (297304).

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

224240 is a wasteful number, since it uses less digits than its factorization.

224240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2816 (or 2810 counting only the distinct ones).

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

The square root of 224240 is about 473.5398610466. The cubic root of 224240 is about 60.7534616169.

Adding to 224240 its reverse (42422), we get a palindrome (266662).

It can be divided in two parts, 224 and 240, that added together give a palindrome (464).

The spelling of 224240 in words is "two hundred twenty-four thousand, two hundred forty", and thus it is an iban number.