Number 40

Interestingness: 11 · Rank #152 of 1000

Visual representations

Binary image (n×n bits)
Element Zr – Zirconium
Octogonal · P8(4) = 40
2³5
Prime factorization

Representations of 40

Greek numeral
μ
Sanskrit numeral
४०
Arabic numeral
٤٠
Roman numeral
XL
Maya numeral
●●
ↂ
Chinese numeral
四十
Hebrew numeral
מ
Egyptian numeral
𓎆𓎆𓎆𓎆
Morse code
....------

40 in different numeral systems

Binary
101000
Base-3
1111
Base-4
220
Base-5
130
Base-6
104
Base-7
55
Base-8
50
Duodecimal
34
Hex
28
Vigesimal
20
Base-24
1g
Base-36
14
Negabinary
1111000

Factorization

Prime factors: 2, 5
Divisors: 1, 2, 4, 5, 8, 10, 20, 40
Sum of divisors other than 40: 50
Product of prime factors: 40 = 2 × 2 × 2 × 5

Number-theory characteristics (7)

Octogonal Difference of 2 squares Evil number Refactorable Even Composite Abundant

Base-10 digit properties (2)

These depend on the decimal representation of the number.

Harshad Duck number

Related primes

Number 40 prime
Prime number before 40
Prime number after 40