4440021 has 8 divisors (see below), whose sum is σ = 5977920. Its totient is φ = 2931072.

The previous prime is 4440019. The next prime is 4440031. The reversal of 4440021 is 1200444.

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

It is not a de Polignac number, because 4440021 - 2¹ = 4440019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4440001) 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, 6876 + ... + 7493.

It is an arithmetic number, because the mean of its divisors is an integer number (747240).

Almost surely, 2^4440021 is an apocalyptic number.

It is an amenable number.

4440021 is a deficient number, since it is larger than the sum of its proper divisors (1537899).

4440021 is a wasteful number, since it uses less digits than its factorization.

4440021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14475.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 4440021 is about 2107.1357336441. The cubic root of 4440021 is about 164.3595744222.

Adding to 4440021 its reverse (1200444), we get a palindrome (5640465).

The spelling of 4440021 in words is "four million, four hundred forty thousand, twenty-one".