74 (number)

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

← 73 74 75 →
← 70 71 72 73 74 75 76 77 78 79 → List of numbers Integers ← 0 10 20 30 40 50 60 70 80 90 →
Cardinal	seventy-four
Ordinal	74th (seventy-fourth)
Factorization	2 × 37
Divisors	1, 2, 37, 74
Greek numeral	ΟΔ´
Roman numeral	LXXIV, lxxiv
Binary	10010102
Ternary	22023
Senary	2026
Octal	1128
Duodecimal	6212
Hexadecimal	4A16

In mathematics

74 is:

• the twenty-first distinct semiprime^[1] 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.^[2]
• the number of collections of subsets of {1, 2, 3} that are closed under union and intersection.^[3]
• φ(74) = φ(σ(74)).^[4]

There are 74 different non-Hamiltonian polyhedra with a minimum number of vertices.^[5]