440023 has 2 divisors, whose sum is σ = 440024. Its totient is φ = 440022.

The previous prime is 440009. The next prime is 440039. The reversal of 440023 is 320044.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 440023 - 2⁵ = 439991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 439985 and 440012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220011 + 220012.

It is an arithmetic number, because the mean of its divisors is an integer number (220012).

2⁴⁴⁰⁰²³ is an apocalyptic number.

440023 is a deficient number, since it is larger than the sum of its proper divisors (1).

440023 is an equidigital number, since it uses as much as digits as its factorization.

440023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 440023 is about 663.3422947468. The cubic root of 440023 is about 76.0603744634.

Adding to 440023 its reverse (320044), we get a palindrome (760067).

The spelling of 440023 in words is "four hundred forty thousand, twenty-three", and thus it is an iban number.