44

Number
$44$ (forty-four) is:


 * $2^2 \times 11$


 * The $5$th subfactorial after $0, 1, 2, 9$:
 * $44 = 5! \left({1 - \dfrac 1 {1!} + \dfrac 1 {2!} - \dfrac 1 {3!} + \dfrac 1 {4!} - \dfrac 1 {5!} }\right)$