40

Properties by base:

Base 1040 (2 digits)
Digit Sum: 4
Digital Root: 4 sad
Base 20b101000 (6 digits)
Digit Sum: 0b10
Digital Root: 0b1 always happy
Base 8050 (2 digits)
Digit Sum: 05
Digital Root: 05 sad
Base 160x28 (2 digits)
Digit Sum: 0xa
Digital Root: 0xa happy

More about this number at Positiv Integers and Number Empire.

The number is not a prime.

Its 4 (2 unique) factors are:
23 = 8
5

Its 8 divisors are:
1
2
4
5
8
10
20
40
Its aliquote sum is:
50
makeing it a abundant number.

In HTML this number represents this color:  
#000028
 

As Unicode codepoint (since version 1.1) this number represents this character:( LEFT PARENTHESIS in ASCII (Source: https://ucdapi.org/unicode/latest/codepoint/dec/40); HTML: (

In the work of Johann Sebastian Bach BWV 40 is Darzu ist erschienen der Sohn Gottes

The number appears at position 70 of the decimal digits of π surrounded by
058209749445923078164062862089986280348253 Source: The Pi-Search Page

Computations done with Math::BigInt 1.999811 and Math::Pari 2.030523 based on PARI/GP 2.11.3 (elapsed: 999.262ms; cpu: 105.929ms)


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