• 544 can be written using four 4's:

544 has 12 divisors (see below), whose sum is σ = 1134. Its totient is φ = 256.

The previous prime is 541. The next prime is 547. The reversal of 544 is 445.

544 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (541) and next prime (547).

It can be written as a sum of positive squares in only one way, i.e., 400 + 144 = 20^2 + 12^2 .

It is an Ulam number.

It is a plaindrome in base 11 and base 14.

It is a nialpdrome in base 9, base 10 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (2) of ones.

In principle, a polygon with 544 sides can be constructed with ruler and compass.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24 + ... + 40.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (567).

544 is an abundant number, since it is smaller than the sum of its proper divisors (590).

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

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

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

The sum of its prime factors is 27 (or 19 counting only the distinct ones).

The product of its digits is 80, while the sum is 13.

The square root of 544 is about 23.3238075794. The cubic root of 544 is about 8.1633102038.

Subtracting from 544 its product of digits (80), we obtain a palindrome (464).

Adding to 544 its reverse (445), we get a palindrome (989).

Subtracting from 544 its reverse (445), we obtain a palindrome (99).

It can be divided in two parts, 54 and 4, that multiplied together give a cube (216 = 6^{3}).

The spelling of 544 in words is "five hundred forty-four", and thus it is an aban number.

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