444409 has 4 divisors (see below), whose sum is σ = 507904. Its totient is φ = 380916.

The previous prime is 444403. The next prime is 444421. The reversal of 444409 is 904444.

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 a cyclic number.

It is not a de Polignac number, because 444409 - 2³ = 444401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (444401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31737 + ... + 31750.

It is an arithmetic number, because the mean of its divisors is an integer number (126976).

2⁴⁴⁴⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

444409 is a deficient number, since it is larger than the sum of its proper divisors (63495).

444409 is an equidigital number, since it uses as much as digits as its factorization.

444409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63494.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 444409 is about 666.6400828033. The cubic root of 444409 is about 76.3122540949.

The spelling of 444409 in words is "four hundred forty-four thousand, four hundred nine".