81781738 (number)

81781738 is an even 8-digits composite number following 81781737 and preceding 81781739. In scientific notation, it is written as 8.1781738 × 10^7. The sum of its digits is 43. It has a total of 4 prime factors and 16 positive divisors. There are 38673936 positive integers (up to 81781738) that are relatively prime to 81781738.

Interesting facts

Basic properties

Name

Name eighty-one million seven hundred eighty-one thousand seven hundred thirty-eight

Notation

Scientific notation 8.1781738 × 10^7
Engineering notation 8.1781738 × 10^6

Prime Factorization of 81781738

Prime Factorization 2 × 19 × 757 × 2843

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81781738
Product of the distinct prime numbers

The prime factorization of 81781738 is 2 × 19 × 757 × 2843. Since it has a total of 4 prime factors.

Most popular turbo-numbers

8, 4, 47, 9, 520, 790, 4939, 4459, 2384, 50150, 75082, 714019, 3119733, 3691716, 46348762, 86058512, 981192653, 606272428, 9991188230, 6823090390

Basic calculations (n = 81781738)

Multiplication

n×y
n×2 163563476
n×3 245345214
n×4 327126952
n×5 408908690

Division

n÷y
n÷2 40890869
n÷3 27260579.333333
n÷3 20445434.5
n÷5 16356347.6

Exponentiation

ny
n2 6688252670300644
n3 5.4697692756033E+23
n4 4.4732723781784E+31
n5 3.6583198963482E+39

Nth Root

y√n
2√n 9043.3256051079
3√n 434.06234460115
4√n 95.096401641218
5√n 38.241178451816

Divisors of 81781738

1, 2, 19, 38, 757, 1514, 2843, 5686, 14383, 28766, 54017, 108034, 2152151, 4304302, 40890869, 81781738

16 divisors

τ Total Divisors 16
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81781737
Sum of the proper positive divisors of n
A Arithmetic Mean 0.0625
Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G Geometric Mean 1
Returns the nth root of the product of n divisors
H Harmonic Mean 16
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81781738 can be divided by 16 positive divisors. The sum of these divisors (counting 81781738) is 1, the average is 0.0625.

Base conversion 81781738

Base System Value
2 Binary 100110111111110001111101010
3 Ternary 12200212221110021
4 Quaternary 10313332033222
5 Quinary 131414003423
6 Senary 12040511054
8 Octal 467761752
10 Decimal 81781738
12 Duodecimal 2347b48a
16 Hexadecimal 4dfe3ea
20 Vigesimal 15b2e6i
36 Base36 1cov6y

Cryptographic Hash Functions

md5 15737784f7dad92e2197e001e583c085
sha1 a2efbb60758732ce50d5c3249ff2a195b04e188d
sha256 03915997da9e868250b1c12817b549e65ddd1c5ae355b9ced0bc77c69b787fa6
sha512 717847f4cb94690e5d808ca090020289b5fac62b8a24e186de3a6438a47ad211cc8b5e294156563f535e4e87097e68dd6f4689c719ea9f8f3eedd0362f72af27
ripemd-160 78f490d04da51c80893049673bbd8a2e206bb974

81781738 as geometric shapes

Circle

Radius = n
Diameter 163563476
Circumference 513849814.59721
Area 2.1011765454369E+16

Sphere

Radius = n
Volume 2.2911715964089E+24
Surface area 8.4047061817475E+16
Circumference 513849814.59721

Square

Length = n
Perimeter 327126952
Area 6688252670300644
Diagonal 115656843.03404

Cube

Length = n
Surface area 40129516021803864
Volume 5.4697692756033E+23
Space diagonal 141650125.34729

Equilateral Triangle

Length = n
Perimeter 245345214
Area 2.8960983597047E+15
Altitude 70825062.673643

Triangular Pyramid

Length = n
Surface area 2.8960983597047E+15
Volume 6.4461849105082E+22
Height 38552281.011348