444609 has 20 divisors (see below), whose sum is σ = 726000. Its totient is φ = 268920.

The previous prime is 444607. The next prime is 444623. The reversal of 444609 is 906444.

It is not a de Polignac number, because 444609 - 2¹ = 444607 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 444609.

It is not an unprimeable number, because it can be changed into a prime (444607) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 642 + ... + 1140.

It is an arithmetic number, because the mean of its divisors is an integer number (36300).

2⁴⁴⁴⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

444609 is a deficient number, since it is larger than the sum of its proper divisors (281391).

444609 is a wasteful number, since it uses less digits than its factorization.

444609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522 (or 513 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 444609 is about 666.7900719117. The cubic root of 444609 is about 76.3237001291.

The spelling of 444609 in words is "four hundred forty-four thousand, six hundred nine".