7744
{{about|the integer|the year 7744|8th millennium}}
{{Infobox number
| number = 7744
| roman = {{overline|V}}MMDCCXLIV, or {{overline|VII}}DCCXLIV
| divisor = 2, 4, 8, 11, 16, 22, 32, 44, 64, 88, 121, 176, 242, 352, 484, 704, 968, 1,936, 3,872
}}
7744 is the natural number following 7743 and preceding 7745.
In mathematics
7744 is:
- the square of 88, and is the smallest nonzero square each of whose decimal digits occur exactly twice.{{Cite OEIS|A052070|name=Smallest squares whose digits occur with the same frequency n}}
- the sum of two fifth powers: 7744 = 65 + (−2)5.{{Cite OEIS|A020896|name=Positive numbers n such that n = x^5 + y^5 has a solution in nonzero integers x, y}}
- a Harshad number in bases 5, 9, 10, 12, 14 and 15.
- the aliquot sum of both 10316 and 15482.
- part of the 29-aliquot tree.
The complete aliquot sequence starting at 7716 is: 7716, 10316, 7744, 9147, 3053, 115, 29, 1, 0