6445044 has 18 divisors (see below), whose sum is σ = 16291730. Its totient is φ = 2148336.

The previous prime is 6445003. The next prime is 6445051. The reversal of 6445044 is 4405446.

It can be written as a sum of positive squares in only one way, i.e., 6441444 + 3600 = 2538^2 + 60^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 6444999 and 6445017.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 89479 + ... + 89550.

Almost surely, 2^6445044 is an apocalyptic number.

It is an amenable number.

6445044 is an abundant number, since it is smaller than the sum of its proper divisors (9846686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6445044 is a wasteful number, since it uses less digits than its factorization.

6445044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179039 (or 179034 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 6445044 is about 2538.7091207935. The cubic root of 6445044 is about 186.0981098778.

The spelling of 6445044 in words is "six million, four hundred forty-five thousand, forty-four".