81871640 (number)

81871640 is an even 8-digits composite number following 81871639 and preceding 81871641. In scientific notation, it is written as 8.1871640 × 10^7. The sum of its digits is 35. It has a total of 7 prime factors and 64 positive divisors. There are 31352832 positive integers (up to 81871640) that are relatively prime to 81871640.

Interesting facts

Basic properties

Name

Name eighty-one million eight hundred seventy-one thousand six hundred forty

Notation

Scientific notation 8.1871640 × 10^7
Engineering notation 8.1871640 × 10^6

Prime Factorization of 81871640

Prime Factorization 2 × 2 × 2 × 5 × 433 × 29 × 163

Composite number
ω Distinct Factors 5
Total number of distinct prime factors
Ω Total Factors 7
Total number of prime factors
rad Radical 20467910
Product of the distinct prime numbers

The prime factorization of 81871640 is 2 × 2 × 2 × 5 × 433 × 29 × 163. Since it has a total of 7 prime factors.

Most popular turbo-numbers

6, 5, 65, 67, 681, 487, 5679, 9603, 63791, 71905, 321983, 879167, 4107764, 6471928, 39114921, 95453234, 319334776, 276370614, 1377818855, 5019291313

Basic calculations (n = 81871640)

Multiplication

n×y
n×2 163743280
n×3 245614920
n×4 327486560
n×5 409358200

Division

n÷y
n÷2 40935820
n÷3 27290546.666667
n÷3 20467910
n÷5 16374328

Exponentiation

ny
n2 6702965436289600
n3 5.4878277313235E+23
n4 4.4929745640093E+31
n5 3.6784719603373E+39

Nth Root

y√n
2√n 9048.2948669901
3√n 434.22134009059
4√n 95.122525549893
5√n 38.249582400614

Divisors of 81871640

1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 163, 232, 290, 326, 433, 580, 652, 815, 866, 1160, 1304, 1630, 1732, 2165, 3260, 3464, 4330, 4727, 6520, 8660, 9454, 12557, 17320, 18908, 23635, 25114, 37816, 47270, 50228, 62785, 70579, 94540, 100456, 125570, 141158, 189080, 251140, 282316, 352895, 502280, 564632, 705790, 1411580, 2046791, 2823160, 4093582, 8187164, 10233955, 16374328, 20467910, 40935820, 81871640

64 divisors

τ Total Divisors 64
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81871639
Sum of the proper positive divisors of n
A Arithmetic Mean 0.015625
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 64
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81871640 can be divided by 64 positive divisors. The sum of these divisors (counting 81871640) is 1, the average is 0.015625.

Base conversion 81871640

Base System Value
2 Binary 100111000010100001100011000
3 Ternary 12201001111202222
4 Quaternary 10320110030120
5 Quinary 131424343030
6 Senary 12042443212
8 Octal 470241430
10 Decimal 81871640
12 Duodecimal 23503508
16 Hexadecimal 4e14318
20 Vigesimal 15bdj20
36 Base36 1cqsk8

Cryptographic Hash Functions

md5 32d2fb46ebf05f1792ff984a2f6517bf
sha1 3c6d1b1e7f687fe65440887dc14d492c09f37df8
sha256 a3687bec099aa63ce709f6c6e985f1926cd18b208e968ee16ff0331da0ead2af
sha512 fc616bf55a813c469b9eb97869dea71ce6ef56b3fc0c724842924cd0495d1de34280cb8d3fcef9edf3d45b95f22340f26bb0afc24a23e095c9c9de41cfd548d5
ripemd-160 145896a75d94ed672d9c48e80810b5406ca5d57a

81871640 as geometric shapes

Circle

Radius = n
Diameter 163743280
Circumference 514414685.5227
Area 2.1057986971914E+16

Sphere

Radius = n
Volume 2.2987359046523E+24
Surface area 8.4231947887655E+16
Circumference 514414685.5227

Square

Length = n
Perimeter 327486560
Area 6702965436289600
Diagonal 115783983.66173

Cube

Length = n
Surface area 40217792617737600
Volume 5.4878277313235E+23
Space diagonal 141805840.17899

Equilateral Triangle

Length = n
Perimeter 245614920
Area 2.9024691742579E+15
Altitude 70902920.089494

Triangular Pyramid

Length = n
Surface area 2.9024691742579E+15
Volume 6.4674670046707E+22
Height 38594661.220576