Forty-four is a tribonacci number, an octahedral number and the number of derangements of 5 items.
Since the greatest prime factor of 442 + 1 = 1937 is 149 and thus more than 44 twice, 44 is a Størmer number.
Given Euler's totient function, φ(44) = 20 and φ(69) = 44.
44 is also a repdigit. In
decimal notation (base 10), 44 is a palindromic number and a happy number.