6445144 has 16 divisors (see below), whose sum is σ = 12168000. Its totient is φ = 3200352.

The previous prime is 6445099. The next prime is 6445147. The reversal of 6445144 is 4415446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1512 + ... + 3895.

It is an arithmetic number, because the mean of its divisors is an integer number (760500).

Almost surely, 2^6445144 is an apocalyptic number.

It is an amenable number.

6445144 is a deficient number, since it is larger than the sum of its proper divisors (5722856).

6445144 is a wasteful number, since it uses less digits than its factorization.

6445144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5562 (or 5558 counting only the distinct ones).

The product of its digits is 7680, while the sum is 28.

The square root of 6445144 is about 2538.7288157659. The cubic root of 6445144 is about 186.0990723597.

The spelling of 6445144 in words is "six million, four hundred forty-five thousand, one hundred forty-four".