444003021 has 48 divisors (see below), whose sum is σ = 827199360. Its totient is φ = 222687360.

The previous prime is 444003011. The next prime is 444003041. The reversal of 444003021 is 120300444.

It is not a de Polignac number, because 444003021 - 2⁷ = 444002893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 444002985 and 444003003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444003011) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9051 + ... + 31143.

It is an arithmetic number, because the mean of its divisors is an integer number (17233320).

Almost surely, 2^444003021 is an apocalyptic number.

It is an amenable number.

444003021 is a deficient number, since it is larger than the sum of its proper divisors (383196339).

444003021 is a wasteful number, since it uses less digits than its factorization.

444003021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22146 (or 22143 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 444003021 is about 21071.3791907412. The cubic root of 444003021 is about 762.8900928259.

Adding to 444003021 its reverse (120300444), we get a palindrome (564303465).

The spelling of 444003021 in words is "four hundred forty-four million, three thousand, twenty-one".