44009 has 4 divisors (see below), whose sum is σ = 50304. Its totient is φ = 37716.

The previous prime is 43997. The next prime is 44017. The reversal of 44009 is 90044.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 44009 - 2⁸ = 43753 is a prime.

It is a magnanimous number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (44029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3137 + ... + 3150.

It is an arithmetic number, because the mean of its divisors is an integer number (12576).

2⁴⁴⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

44009 is a deficient number, since it is larger than the sum of its proper divisors (6295).

44009 is an equidigital number, since it uses as much as digits as its factorization.

44009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6294.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 44009 is about 209.7832214454. The cubic root of 44009 is about 35.3058902448.

The spelling of 44009 in words is "forty-four thousand, nine".