444644309 has 4 divisors (see below), whose sum is σ = 446751840. Its totient is φ = 442536780.

The previous prime is 444644297. The next prime is 444644339. The reversal of 444644309 is 903446444.

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 444644309 - 2⁴ = 444644293 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 (444644339) 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, 1053449 + ... + 1053870.

It is an arithmetic number, because the mean of its divisors is an integer number (111687960).

Almost surely, 2^444644309 is an apocalyptic number.

It is an amenable number.

444644309 is a deficient number, since it is larger than the sum of its proper divisors (2107531).

444644309 is a wasteful number, since it uses less digits than its factorization.

444644309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2107530.

The product of its (nonzero) digits is 165888, while the sum is 38.

The square root of 444644309 is about 21086.5907391404. The cubic root of 444644309 is about 763.2572051274.

The spelling of 444644309 in words is "four hundred forty-four million, six hundred forty-four thousand, three hundred nine".