440823 has 4 divisors (see below), whose sum is σ = 587768. Its totient is φ = 293880.

The previous prime is 440821. The next prime is 440831. The reversal of 440823 is 328044.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 440823 - 2¹ = 440821 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 440823.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 440823.

It is not an unprimeable number, because it can be changed into a prime (440821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73468 + ... + 73473.

It is an arithmetic number, because the mean of its divisors is an integer number (146942).

2⁴⁴⁰⁸²³ is an apocalyptic number.

440823 is a deficient number, since it is larger than the sum of its proper divisors (146945).

440823 is a wasteful number, since it uses less digits than its factorization.

440823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146944.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 440823 is about 663.9450278449. The cubic root of 440823 is about 76.1064413440.

Adding to 440823 its reverse (328044), we get a palindrome (768867).

The spelling of 440823 in words is "four hundred forty thousand, eight hundred twenty-three".