444413668 has 12 divisors (see below), whose sum is σ = 786463020. Its totient is φ = 219709952.

The previous prime is 444413663. The next prime is 444413689. The reversal of 444413668 is 866314444.

It can be written as a sum of positive squares in 2 ways, for example, as 238146624 + 206267044 = 15432^2 + 14362^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 444413668.

It is not an unprimeable number, because it can be changed into a prime (444413663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 623821 + ... + 624532.

It is an arithmetic number, because the mean of its divisors is an integer number (65538585).

Almost surely, 2^444413668 is an apocalyptic number.

It is an amenable number.

444413668 is a deficient number, since it is larger than the sum of its proper divisors (342049352).

444413668 is a wasteful number, since it uses less digits than its factorization.

444413668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248446 (or 1248444 counting only the distinct ones).

The product of its digits is 221184, while the sum is 40.

The square root of 444413668 is about 21081.1211276820. The cubic root of 444413668 is about 763.1252128451.

The spelling of 444413668 in words is "four hundred forty-four million, four hundred thirteen thousand, six hundred sixty-eight".