40

Previous number

39

Next number

41

Sum of digits

4

Divisors of 40

Number of divisors

8

Sum of divisors

90

Factorization

40 = 2 × 2 × 2 × 5

Prime factors of 40

Factor Count
2 3
5 1

Square of 40

1600

Cube of 40

64000

Square root of 40

6.32455532033675904557412650319748...

Cube root of 40

3.41995189335339366820676332281437...

40th triangle number

820

Reciprocal of 40

0.0250000000000000

Binary of 40

101000

Number of digits of 40 in base 2

6

Octal of 40

50

Hexadecimal of 40

28

Prime number No
Hexagonal number No
Perfect number No
Deficient number No
Abundant number No
Mersenne number No
Harshad number Yes
Harmonic divisor number No

Quadratic residues of 40

QR40 (sequence)

40th composite number

57

Euler's totient function of 40

16

Carmichael function of 40

4

Möbius function of 40

0

Properties of 40

Properties of the number 40: 40 has 8 divisors. The divisors of 40 are 1, 2, 4, 5, 8, 10, 20, 40 and the sum of them is 90. The factorization of 40 is 2 × 2 × 2 × 5. The square and cube of 40 are 1600 and 64000 respectively. The square root and cube root of 40 are 6.32455532033675904557412650319748... and 3.41995189335339366820676332281437.... The binary, octal, hexadecimal of 40 are 101000, 50, 28. 40 is not a prime number, not hexagonal number, not perfect number, not deficient number, not Mersenne number, not Mersenne number, Harshad number, not harmonic divisor number.

sin 40

0.74511316047934883499692659825087...

cos 40

-0.66693806165226188209516067217919...

tan 40

-1.11721493092389589918411729740910...

sin 40°

0.64278760968653925189641995530110...

cos 40°

0.76604444311897801345168090847437...

tan 40°

0.83909963117727992543137816028320...

log 40

3.68887945411393625150253683386836...

log10 40

1.60205999132796250705723650753498...

log2 40

5.32192809488736262579777758219279...

Related pairs