444009 has 12 divisors (see below), whose sum is σ = 613904. Its totient is φ = 285384.

The previous prime is 444007. The next prime is 444029. The reversal of 444009 is 900444.

It is a happy number.

It is not a de Polignac number, because 444009 - 2¹ = 444007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (444001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6594 + ... + 6660.

2⁴⁴⁴⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

444009 is a deficient number, since it is larger than the sum of its proper divisors (169895).

444009 is an equidigital number, since it uses as much as digits as its factorization.

444009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 444009 is about 666.3400033016. The cubic root of 444009 is about 76.2893517202.

The spelling of 444009 in words is "four hundred forty-four thousand, nine".