6445544 has 16 divisors (see below), whose sum is σ = 13812000. Its totient is φ = 2762352.

The previous prime is 6445529. The next prime is 6445547. The reversal of 6445544 is 4455446.

It is a self number, because there is not a number n which added to its sum of digits gives 6445544.

It is not an unprimeable number, because it can be changed into a prime (6445547) 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 3 ways as a sum of consecutive naturals, for example, 57494 + ... + 57605.

It is an arithmetic number, because the mean of its divisors is an integer number (863250).

Almost surely, 2^6445544 is an apocalyptic number.

It is an amenable number.

6445544 is an abundant number, since it is smaller than the sum of its proper divisors (7366456).

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

6445544 is a wasteful number, since it uses less digits than its factorization.

6445544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115112 (or 115108 counting only the distinct ones).

The product of its digits is 38400, while the sum is 32.

The square root of 6445544 is about 2538.8075941276. The cubic root of 6445544 is about 186.1029221878.

The spelling of 6445544 in words is "six million, four hundred forty-five thousand, five hundred forty-four".