A number with only two divisors (itself and 1) is a prime number. If a prime number can be written as 2n – 1 for some n, the prime number is a Mersenne prime. If the sum of divisors of a number (excluding the number itself) equals the number, the number is a perfect number.

Perfect number, a positive integer that is equal to the sum of its proper divisors. The smallest perfect number is 6, which is the sum of 1, 2, and 3. Other perfect numbers are 28, 496, and 8,128.

No, 10 is not a perfect number. The divisors of 10 are 1, 2, 5, and 10. Therefore, the proper divisors of 10, or the divisors of 10 other than 10…

A survey launched by a British mathematics writer has found that seven is the world’s favorite number, reports The Guardian. The results of the online survey were published on Tuesday, with three, eight and and four coming second, third and fourth.

Almost half of all people chose numbers between 1 and 10. The second-place number was 3, followed by 8, 4, 5, 13, 9, 6, 2, and 11, to round out the top ten choices. Interestingly, every number between 1 and 100 was chosen by someone: the number 39 has fans, as does 53, 62 or any of the others.

“Cellar Door” One of the most famous theories comes from Lord of the Rings author J.R.R. Tolkien, who proposed in a 1955 speech that “cellar door” is the most beautiful word (or phrase) in the English language.

What is another word for badass?

What are Power Words? Power words are words that smart copywriters use to trigger a psychological or emotional response. They’re called “power words” because they are so persuasive that people simply can’t resist being influenced by them! But power words aren’t just for copywriters.