6444445 has 16 divisors (see below), whose sum is σ = 9358848. Its totient is φ = 4158720.

The previous prime is 6444443. The next prime is 6444481. The reversal of 6444445 is 5444446.

It is not a de Polignac number, because 6444445 - 2¹ = 6444443 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6444443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4821 + ... + 6010.

It is an arithmetic number, because the mean of its divisors is an integer number (584928).

Almost surely, 2^6444445 is an apocalyptic number.

It is an amenable number.

6444445 is a deficient number, since it is larger than the sum of its proper divisors (2914403).

6444445 is a wasteful number, since it uses less digits than its factorization.

6444445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10860.

The product of its digits is 30720, while the sum is 31.

The square root of 6444445 is about 2538.5911447100. The cubic root of 6444445 is about 186.0923444028.

Subtracting from 6444445 its reverse (5444446), we obtain a palindrome (999999).

It can be divided in two parts, 6444 and 445, that added together give a square (6889 = 83²).

The spelling of 6444445 in words is "six million, four hundred forty-four thousand, four hundred forty-five".