445444 has 12 divisors (see below), whose sum is σ = 784924. Its totient is φ = 221184.

The previous prime is 445433. The next prime is 445447. The reversal of 445444 is 444544.

It can be written as a sum of positive squares in 2 ways, for example, as 315844 + 129600 = 562^2 + 360^2 .

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 484 + ... + 1060.

2⁴⁴⁵⁴⁴⁴ is an apocalyptic number.

It is an amenable number.

445444 is a deficient number, since it is larger than the sum of its proper divisors (339480).

445444 is a wasteful number, since it uses less digits than its factorization.

445444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774 (or 772 counting only the distinct ones).

The product of its digits is 5120, while the sum is 25.

The square root of 445444 is about 667.4159123066. The cubic root of 445444 is about 76.3714502758.

Adding to 445444 its reverse (444544), we get a palindrome (889988).

Subtracting from 445444 its reverse (444544), we obtain a square (900 = 30²).

The spelling of 445444 in words is "four hundred forty-five thousand, four hundred forty-four".