What is 72?

Here's some information about the number 72, presented in Markdown format with the requested links:

72

• Mathematics: 72 is a composite number. It is an even number, divisible by 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, and 72. It is also a highly composite number, meaning it has more divisors than any smaller positive integer. Its prime factorization is 2³ x 3². 72 is also an <a href="https://www.wikiwhat.page/kavramlar/abundant%20number">abundant number</a>, because the sum of its proper divisors (1+2+3+4+6+8+9+12+18+24+36 = 123) is greater than itself.
• Science: 72 is the atomic number of <a href="https://www.wikiwhat.page/kavramlar/hafnium">hafnium</a> (Hf).
• Culture: 72 is sometimes associated with completion or a cycle, potentially relating to the common base number of 12 as 6 x 12= 72 and 12 being highly divisible and thus a foundation for many number systems historically.
• Other: There are 72 points on a standard roulette wheel (numbered 1-36 plus 0 and 00).