Know Your Number

An even number is an integer that can be divided equally by 2, resulting in another integer. In other words, an even number is a number that ends in 0 , 2, 4, 6 or 8. Thefore, an even number is a number that is divisible by 2, resulting in another integer.

A happy number is an integer that, when replaced by the sum of the squares of its digits, eventually results in 1. In other words, a happy number is a number that, when squared and added repeatedly, eventually results in 1. Example: 19

A prime number is a integer greater than 1 that has only two divisors: 1 and itself. words, a prime number is a number that cannot be divided evenly by any other number except 1 and itself. Example: 17

A perfect number is an integer that is equal to the sum of its proper divisors. In other words, a perfect number is a number that has the same number of divisors as the sum of its proper divisors. Example: 6 and 496

A palindromic number is a number that is the same when read forwards or backwards. In other words, a palindromic number is a number that is the same when read front to back or back to front. Example: 121

A square number is an integer that can be represented as the product of two equal integers. In other words, a square number is a number that can be written as n^2, where n is an integer. Example: 16 or 25

A triangular number is an integer that can be represented as the sum of consecutive integers. In other words, a triangular number is a number that can be written as n(n+1)/2, where n is an integer. Example: 10

An abundant number is an integer that is greater than the sum of its proper divisors. In other words, an abundant number is a number that has more divisors than the sum of its proper divisors. Example: 12

A deficient number is an integer that is less than the sum of its proper divisors. In other words, a deficient number is a number that has fewer divisors than the sum of its proper divisors. Example: 10 or 16