444644645 has 8 divisors (see below), whose sum is σ = 533704704. Its totient is φ = 355628304.

The previous prime is 444644633. The next prime is 444644647. The reversal of 444644645 is 546446444.

It is a happy number.

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 444644645 - 2¹⁸ = 444382501 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 (444644647) 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 7 ways as a sum of consecutive naturals, for example, 18812 + ... + 35258.

It is an arithmetic number, because the mean of its divisors is an integer number (66713088).

Almost surely, 2^444644645 is an apocalyptic number.

It is an amenable number.

444644645 is a deficient number, since it is larger than the sum of its proper divisors (89060059).

444644645 is a wasteful number, since it uses less digits than its factorization.

444644645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21859.

The product of its digits is 737280, while the sum is 41.

The square root of 444644645 is about 21086.5987062874. The cubic root of 444644645 is about 763.2573973817.

The spelling of 444644645 in words is "four hundred forty-four million, six hundred forty-four thousand, six hundred forty-five".