444509 has 8 divisors (see below), whose sum is σ = 494592. Its totient is φ = 396720.

The previous prime is 444487. The next prime is 444517. The reversal of 444509 is 905444.

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

It is a cyclic number.

It is not a de Polignac number, because 444509 - 2⁸ = 444253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444529) 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, 149 + ... + 954.

It is an arithmetic number, because the mean of its divisors is an integer number (61824).

2⁴⁴⁴⁵⁰⁹ is an apocalyptic number.

It is an amenable number.

444509 is a deficient number, since it is larger than the sum of its proper divisors (50083).

444509 is a wasteful number, since it uses less digits than its factorization.

444509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 444509 is about 666.7150815753. The cubic root of 444509 is about 76.3179775412.

The spelling of 444509 in words is "four hundred forty-four thousand, five hundred nine".