81444639 (number)

81444639 is an odd 8-digits composite number following 81444638 and preceding 81444640. In scientific notation, it is written as 8.1444639 × 10^7. The sum of its digits is 39. It has a total of 2 prime factors and 4 positive divisors. There are 54296424 positive integers (up to 81444639) that are relatively prime to 81444639.

Interesting facts

Basic properties

Name

Name eighty-one million four hundred forty-four thousand six hundred thirty-nine

Notation

Scientific notation 8.1444639 × 10^7
Engineering notation 8.1444639 × 10^6

Prime Factorization of 81444639

Prime Factorization 3 × 27148213

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 81444639
Product of the distinct prime numbers

The prime factorization of 81444639 is 3 × 27148213. Since it has a total of 2 prime factors.

Most popular turbo-numbers

3, 5, 3, 57, 271, 863, 222, 9784, 3096, 95858, 880200, 705162, 1469191, 9568068, 7051288, 3100049, 36685490, 244421231, 4639806396, 9330292991

Basic calculations (n = 81444639)

Multiplication

n×y
n×2 162889278
n×3 244333917
n×4 325778556
n×5 407223195

Division

n÷y
n÷2 40722319.5
n÷3 27148213
n÷3 20361159.75
n÷5 16288927.8

Exponentiation

ny
n2 6633229221840321
n3 5.4024095937704E+23
n4 4.3999729909476E+31
n5 3.5835421185748E+39

Nth Root

y√n
2√n 9024.6683595576
3√n 433.46513104726
4√n 94.998254507952
5√n 38.209600814809

Divisors of 81444639

1, 3, 27148213, 81444639

4 divisors

τ Total Divisors 4
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81444638
Sum of the proper positive divisors of n
A Arithmetic Mean 0.25
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 4
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81444639 can be divided by 4 positive divisors. The sum of these divisors (counting 81444639) is 1, the average is 0.25.

Base conversion 81444639

Base System Value
2 Binary 100110110101011111100011111
3 Ternary 12200020211001010
4 Quaternary 10312223330133
5 Quinary 131322212024
6 Senary 12025350303
8 Octal 466537437
10 Decimal 81444639
12 Duodecimal 23338393
16 Hexadecimal 4dabf1f
20 Vigesimal 1590bbj
36 Base36 1chn33

Cryptographic Hash Functions

md5 30a17529e5fa3047c741ba45af1cf3fe
sha1 f196a2136858a08aa2bee2aaab9cac542ed33ea7
sha256 0996d33084f5a0153058077868cd5f30147f5fb4821a418331060f7afaf2138b
sha512 5a0275cfa8c20fc18b5bc0af52c7430b1a2ecfc3ee1bba5db5fcd82f178fc9dc91904237d970d46a116e17100e43fcbb7c9932b4ea8bc4b62669ff02ab387433
ripemd-160 0eb43a5be35e6fa264d8ace566690202f41b8739

81444639 as geometric shapes

Circle

Radius = n
Diameter 162889278
Circumference 511731759.11335
Area 2.0838904192911E+16

Sphere

Radius = n
Volume 2.2629560388629E+24
Surface area 8.3355616771643E+16
Circumference 511731759.11335

Square

Length = n
Perimeter 325778556
Area 6633229221840321
Diagonal 115180113.05638

Cube

Length = n
Surface area 39799375331041926
Volume 5.4024095937704E+23
Space diagonal 141066252.75211

Equilateral Triangle

Length = n
Perimeter 244333917
Area 2.8722725076195E+15
Altitude 70533126.376053

Triangular Pyramid

Length = n
Surface area 2.8722725076195E+15
Volume 6.3668007641705E+22
Height 38393371.018794