74 (number)

74 (seventy-four) is the natural number following 73 and preceding 75.

In mathematics 74 is:

the twenty-first distinct semiprime and the eleventh of the form (2.q), where q is a higher prime. with an aliquot sum of 40, within an aliquot sequence of three composite numbers (74, 40, 50, 43, 1, 0) to the Prime in the 43-aliquot tree. a palindromic number in bases 6 (2026) and 36 (2236). a nontotient. the number of collections of subsets of {1, 2, 3} that are closed under union and intersection. φ(74) = φ(σ(74)). a sad number

There are 74 different non-Hamiltonian polyhedra with a minimum number of vertices.

References