844445 has 16 divisors (see below), whose sum is σ = 1209600. Its totient is φ = 553344.

The previous prime is 844439. The next prime is 844447. The reversal of 844445 is 544448.

844445 = 22² + 23² + ... + 136².

It is a cyclic number.

It is not a de Polignac number, because 844445 - 2⁴ = 844429 is a prime.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 844445.

It is not an unprimeable number, because it can be changed into a prime (844447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 281 + ... + 1329.

It is an arithmetic number, because the mean of its divisors is an integer number (75600).

2⁸⁴⁴⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

844445 is a deficient number, since it is larger than the sum of its proper divisors (365155).

844445 is a wasteful number, since it uses less digits than its factorization.

844445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084.

The product of its digits is 10240, while the sum is 29.

The square root of 844445 is about 918.9368857544. The cubic root of 844445 is about 94.5200166626.

The spelling of 844445 in words is "eight hundred forty-four thousand, four hundred forty-five".