# 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.A.

### 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).#### WHY IS 496 a perfect number?

Also related to its being a**perfect number**,**496**is a harmonic divisor**number**, since the**number**of proper divisors of**496**divided by the sum of the reciprocals of its divisors, 1, 2, 4, 8, 16, 31, 62, 124, 248 and**496**, (the harmonic mean), yields an integer, 5 in this case. It is the largest happy**number**less than 500.#### Why is 12 not a perfect number?

**Numbers**like 6 that equal the sum of their factors are called**perfect numbers**. 4 is**not a perfect number**because the sum of its factors (besides 4 itself), 1+2, is less than 4.**Numbers**like 4 are known as deficient**numbers**.**12**is**not a perfect number**because the sum of its factors, 1+2+3+4+6 is greater than**12**.#### What is an abundant number?

In**number**theory, an**abundant number**or excessive**number**is a**number**for which the sum of its proper divisors is greater than the**number**itself. The integer 12 is the first**abundant number**. Its proper divisors are 1, 2, 3, 4 and 6 for a total of 16.

B.

### 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 a good luck number?

**Here's a list of lucky and unlucky Chinese numbers!**- 2 (?, ÈR) - LUCKY. The Chinese believe that doubles bring blessings.
- 3 (?, SĀN) - LUCKY.
- 4 (?, SÌ) - UNLUCKY.
- 5 (?, WǓ) - LUCKY/UNLUCKY.
- 6 (?, LIÙ) - LUCKY.
- 7 ?, QĪ- LUCKY/UNLUCKY.
- 8 (?, BĀ) - LUCKY.
- 9 (?, JIǓ) - LUCKY.

#### What is an unlucky number?

The number**13**is considered an unlucky number in some countries. The end of the Mayan calendar's 13th Baktun was superstitiously feared as a harbinger of the apocalyptic 2012 phenomenon. Fear of the number**13**has a specifically recognized phobia, Triskaidekaphobia, a word coined in 1911.#### Is the number 10 good luck?

**Number 10**is rarely used in Chinese culture to symbolize anything because**10**is considered a "full"**number**. Chinese culture value moderation (????), meaning too much can be just as bad as not enough. We also believe cycle of life, whatever goes up will go down.

C.

### 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 the 888 area code?

The area codes or prefixes**800**, 833,**844**,**855**,**866**,**877**and 888 are used by toll free numbers in the United States, Canada and all the countries covered by the North American Numbering Plan.#### What are the numbers 555?

**Angel Number 555**is a message from your**angels**that it is time to let go of the 'old' that is no longer positively serving you. Trust that they will be replaced with 'better'. Release old doubts, fears and perceived obstacles, and if feeling any fears or confusion, ask for support and guidance from your**angels**.#### 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.

Updated: 3rd October 2019