440424 has 32 divisors (see below), whose sum is σ = 1224000. Its totient is φ = 146736.

The previous prime is 440399. The next prime is 440431. The reversal of 440424 is 424044.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 440397 and 440406.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 804 + ... + 1235.

It is an arithmetic number, because the mean of its divisors is an integer number (38250).

2⁴⁴⁰⁴²⁴ is an apocalyptic number.

It is an amenable number.

440424 is an abundant number, since it is smaller than the sum of its proper divisors (783576).

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

440424 is a wasteful number, since it uses less digits than its factorization.

440424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2054 (or 2044 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 440424 is about 663.6444831384. The cubic root of 440424 is about 76.0834724604.

Adding to 440424 its reverse (424044), we get a palindrome (864468).

The spelling of 440424 in words is "four hundred forty thousand, four hundred twenty-four", and thus it is an iban number.