444021423 has 16 divisors (see below), whose sum is σ = 609544320. Its totient is φ = 287296416.

The previous prime is 444021377. The next prime is 444021467. The reversal of 444021423 is 324120444.

It is a happy number.

It is not a de Polignac number, because 444021423 - 2²¹ = 441924271 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 444021393 and 444021402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444021323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41736 + ... + 51282.

It is an arithmetic number, because the mean of its divisors is an integer number (38096520).

Almost surely, 2^444021423 is an apocalyptic number.

444021423 is a deficient number, since it is larger than the sum of its proper divisors (165522897).

444021423 is a wasteful number, since it uses less digits than its factorization.

444021423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10006.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 444021423 is about 21071.8158448673. The cubic root of 444021423 is about 762.9006321758.

Adding to 444021423 its reverse (324120444), we get a palindrome (768141867).

It can be divided in two parts, 444021 and 423, that added together give a palindrome (444444).

The spelling of 444021423 in words is "four hundred forty-four million, twenty-one thousand, four hundred twenty-three".