• Deleting all the even digits from 2344 we obtain a prime of 55 digits.
• 344 can be written using four 4's:
344 is nontrivially palindromic in base 7.
344 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
It is a tau number, because it is divible by the number of its divisors (8).
It is a plaindrome in base 5, base 10, base 12, base 15 and base 16.
It is a nialpdrome in base 8 and base 9.
It is a congruent number.
It is an amenable number.
344 is a wasteful number, since it uses less digits than its factorization.
344 is an evil number, because the sum of its binary digits is even.
The square root of 344 is about 18.5472369910. The cubic root of 344 is about 7.0067961208.
Subtracting from 344 its sum of digits (11), we obtain a palindrome (333).
Adding to 344 its reverse (443), we get a palindrome (787).
Subtracting 344 from its reverse (443), we obtain a palindrome (99).