440423 has 4 divisors (see below), whose sum is σ = 455640. Its totient is φ = 425208.

The previous prime is 440399. The next prime is 440431. The reversal of 440423 is 324044.

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

It is a cyclic number.

It is not a de Polignac number, because 440423 - 2¹⁶ = 374887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440443) by changing a digit.

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, 7565 + ... + 7622.

It is an arithmetic number, because the mean of its divisors is an integer number (113910).

2⁴⁴⁰⁴²³ is an apocalyptic number.

440423 is a deficient number, since it is larger than the sum of its proper divisors (15217).

440423 is a wasteful number, since it uses less digits than its factorization.

440423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15216.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 440423 is about 663.6437297225. The cubic root of 440423 is about 76.0834148769.

Adding to 440423 its reverse (324044), we get a palindrome (764467).

The spelling of 440423 in words is "four hundred forty thousand, four hundred twenty-three", and thus it is an iban number.