• 622 can be written using four 4's:
It is a happy number.
622 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
622 is an esthetic number in base 4, because in such base its adjacent digits differ by 1.
It is a plaindrome in base 8, base 13 and base 16.
It is a nialpdrome in base 5, base 9 and base 10.
It is a congruent number.
It is an unprimeable number.
622 is a wasteful number, since it uses less digits than its factorization.
622 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 313.
The square root of 622 is about 24.9399278267. The cubic root of 622 is about 8.5361779796.
Adding to 622 its product of digits (24), we get a palindrome (646).
Adding to 622 its reverse (226), we get a palindrome (848).
The spelling of 622 in words is "six hundred twenty-two", and thus it is an aban number.