440224 has 12 divisors (see below), whose sum is σ = 866754. Its totient is φ = 220096.

The previous prime is 440221. The next prime is 440227. The reversal of 440224 is 422044.

It is an interprime number because it is at equal distance from previous prime (440221) and next prime (440227).

It can be written as a sum of positive squares in only one way, i.e., 435600 + 4624 = 660^2 + 68^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 440198 and 440207.

It is not an unprimeable number, because it can be changed into a prime (440221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6847 + ... + 6910.

2⁴⁴⁰²²⁴ is an apocalyptic number.

It is an amenable number.

440224 is a deficient number, since it is larger than the sum of its proper divisors (426530).

440224 is a wasteful number, since it uses less digits than its factorization.

440224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13767 (or 13759 counting only the distinct ones).

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

The square root of 440224 is about 663.4937829400. The cubic root of 440224 is about 76.0719540157.

Adding to 440224 its reverse (422044), we get a palindrome (862268).

The spelling of 440224 in words is "four hundred forty thousand, two hundred twenty-four", and thus it is an iban number.