444423 has 8 divisors (see below), whose sum is σ = 677248. Its totient is φ = 253944.

The previous prime is 444421. The next prime is 444443. The reversal of 444423 is 324444.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 444423 - 2¹ = 444421 is a prime.

It is a super-3 number, since 3×444423³ = 263336363979344901, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 21163 = 444423 / (4 + 4 + 4 + 4 + 2 + 3).

It is a d-powerful number, because it can be written as 4 + 4⁵ + 4⁶ + 4⁹ + 2³ + 3¹¹ .

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 444423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10561 + ... + 10602.

It is an arithmetic number, because the mean of its divisors is an integer number (84656).

2⁴⁴⁴⁴²³ is an apocalyptic number.

444423 is a deficient number, since it is larger than the sum of its proper divisors (232825).

444423 is a wasteful number, since it uses less digits than its factorization.

444423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21173.

The product of its digits is 1536, while the sum is 21.

The square root of 444423 is about 666.6505831393. The cubic root of 444423 is about 76.3130554291.

Adding to 444423 its sum of digits (21), we get a palindrome (444444).

Adding to 444423 its reverse (324444), we get a palindrome (768867).

The spelling of 444423 in words is "four hundred forty-four thousand, four hundred twenty-three", and thus it is an iban number.