What is the perfect number?

In number theory, a perfect number is a positive integer that is equal to the sum of its proper positive divisors, that is, the sum of its positive divisors excluding the number itself (also known as its aliquot sum).
A.

What is a happy number?

Happy number. A happy number is defined by the following process: Starting with any positive integer, replace the number by the sum of the squares of its digits in base-ten, and repeat the process until the number either equals 1 (where it will stay), or it loops endlessly in a cycle that does not include 1.
  • What is the happiest number?

    What is the happiest number between 1 and 1,000,000. I define the happiest number as the smallest number that finds the most other happy numbers with it, i.e. 7 found four other numbers (49, 97, 130, and 10) making it a rank 4 in happiness.
  • What does the number 88 mean?

    88 is a white supremacist numerical code for "Heil Hitler." H is the eighth letter of the alphabet, so 88 = HH = Heil Hitler. One of the most common white supremacist symbols, 88 is used throughout the entire white supremacist movement, not just neo-Nazis.
  • Why is 11 a lucky number?

    Some numerologists believe that events linked to the time 11:11 appear more often than can be explained by chance or coincidence. This belief is related to the concept of synchronicity. Some authors claim that seeing 11:11 on a clock is an auspicious sign. Others claim that 11:11 signals a spirit presence.
B.

What is meant by Adam Number?

Adam Number. Adam number is a number when reversed, the square of the number and the square of the reversed number should be numbers which are reverse of each other. Adam numbers upto 1000 are: 0, 1, 2, 3, 11, 12, 13, 21, 22, 31, 101, 102, 103, 111, 112 , 113, 121, 122, 201, 202, 211, 212, 221, 301, 311.
  • What is meant by Adam Number?

    Adam number is a number when reversed, the square of the number and the square of the reversed number should be numbers which are reverse of each other. Adam numbers upto 1000 are: 0, 1, 2, 3, 11, 12, 13, 21, 22, 31, 101, 102, 103, 111, 112 , 113, 121, 122, 201, 202, 211, 212, 221, 301, 311.
  • What is the spiritual meaning of the number 444?

    Angel Number 444 asks that you pay attention to your intuition and inner-wisdom as your connection with your angels and the angelic realm is very strong at this time. Angel Number 444 is a message that you have nothing to fear in regards to your life, work and Divine life purpose.
  • What is the spiritual meaning of 9?

    Biblical numerology of number 9 is the finality or the judgement. It is generally when at the time of judging a person and his works. Also, number 9 is used to define the perfect movement of God. The biblical number 9 is a number of patience.
C.

What are the Armstrong numbers?

An Armstrong number of three digits is an integer such that the sum of the cubes of its digits is equal to the number itself. For example, 371 is an Armstrong number since 3**3 + 7**3 + 1**3 = 371. Write a program to find all Armstrong number in the range of 0 and 999.
  • How many Armstrong numbers are there?

    The -digit numbers equal to the sum of th powers of their digits (a finite sequence) are called Armstrong numbers or plus perfect number and are given by 1, 2, 3, 4, 5, 6, 7, 8, 9, 153, 370, 371, 407, 1634, 8208, 9474, 54748, (OEIS A005188).
  • What is meant by neon number?

    A neon number is a number where the sum of digits of square of the number is equal to the number. For example if the input number is 9, its square is 9*9 = 81 and sum of the digits is 9. i.e. 9 is a neon number. C program to check a number is a neon number or not.
  • What is a perfect number in C?

    This C Program checks whether a given number is perfect number. Perfect number is a number which is equal to sum of its divisor. For eg,divisors of 6 are 1,2 and 3. The sum of these divisors is 6. The C program is successfully compiled and run on a Linux system.

Updated: 29th September 2018

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