What does the number 72 mean?

72 is the number of degrees in the central angle of a regular pentagon, which is constructible with a compass and straight-edge. 72 plays a role in the Rule of 72 in economics when approximating annual compounding of interest rates of a round 6% to 10%, due in part to its high number of divisors.

What are the positive factors of 72?

Thus, the positive factors of 72 are 1, 2, 3, 4, 6, 8, 9 12, 18, 24, 36, and 72. Prime factorization is a way of expressing a number as a product of its prime factors. For example, is not the prime factorization of 72 as number 6 is not a prime number.

What is the rule of 72?

The Rule of 72 is a convenient approach to approximate how long it will take for invested capital to double in value. In order to figure out the number of years it would take to double an investment, 72 is divided by the investment’s annual return.