6544244 has 36 divisors (see below), whose sum is σ = 13468644. Its totient is φ = 2774016.

The previous prime is 6544243. The next prime is 6544261. The reversal of 6544244 is 4424456.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3952144 + 2592100 = 1988^2 + 1610^2 .

Its product of digits (15360) is a multiple of the sum of its prime factors (384).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6544243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33812 + ... + 34004.

It is an arithmetic number, because the mean of its divisors is an integer number (374129).

Almost surely, 2^6544244 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6544244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6734322).

6544244 is an abundant number, since it is smaller than the sum of its proper divisors (6924400).

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

6544244 is a wasteful number, since it uses less digits than its factorization.

6544244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384 (or 375 counting only the distinct ones).

The product of its digits is 15360, while the sum is 29.

The square root of 6544244 is about 2558.1720035994. The cubic root of 6544244 is about 187.0480397419.

The spelling of 6544244 in words is "six million, five hundred forty-four thousand, two hundred forty-four".