81445820 (number)

81445820 is an even 8-digits composite number following 81445819 and preceding 81445821. In scientific notation, it is written as 8.1445820 × 10^7. The sum of its digits is 32. It has a total of 4 prime factors and 12 positive divisors. There are 32578320 positive integers (up to 81445820) that are relatively prime to 81445820.

Interesting facts

Basic properties

Name

Name eighty-one million four hundred forty-five thousand eight hundred twenty

Notation

Scientific notation 8.1445820 × 10^7
Engineering notation 8.1445820 × 10^6

Prime Factorization of 81445820

Prime Factorization 2 × 2 × 5 × 4072291

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 40722910
Product of the distinct prime numbers

The prime factorization of 81445820 is 2 × 2 × 5 × 4072291. Since it has a total of 4 prime factors.

Most popular turbo-numbers

1, 9, 73, 93, 721, 803, 8424, 7576, 52549, 86347, 164490, 678240, 3628996, 3598573, 34776078, 54885626, 253465581, 610669935, 3102039079, 1417011312

Basic calculations (n = 81445820)

Multiplication

n×y
n×2 162891640
n×3 244337460
n×4 325783280
n×5 407229100

Division

n÷y
n÷2 40722910
n÷3 27148606.666667
n÷3 20361455
n÷5 16289164

Exponentiation

ny
n2 6633421595472400
n3 5.4026446124896E+23
n4 4.400228206328E+31
n5 3.5838019445151E+39

Nth Root

y√n
2√n 9024.7337910877
3√n 433.46722621215
4√n 94.998598890129
5√n 38.209711626957

Divisors of 81445820

1, 2, 4, 5, 10, 20, 4072291, 8144582, 16289164, 20361455, 40722910, 81445820

12 divisors

τ Total Divisors 12
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81445819
Sum of the proper positive divisors of n
A Arithmetic Mean 0.083333333333333
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 12
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81445820 can be divided by 12 positive divisors. The sum of these divisors (counting 81445820) is 1, the average is 0.083333333333333.

Base conversion 81445820

Base System Value
2 Binary 100110110101100001110111100
3 Ternary 12200020212122212
4 Quaternary 10312230032330
5 Quinary 131322231240
6 Senary 12025355552
8 Octal 466541674
10 Decimal 81445820
12 Duodecimal 23338bb8
16 Hexadecimal 4dac3bc
20 Vigesimal 1590eb0
36 Base36 1chnzw

Cryptographic Hash Functions

md5 3cf7c2034e1ef6238d269b174384c121
sha1 af0d8e9c5862aac42ee65adda8bede3aa7470bf6
sha256 4870cb8eb76126cc8ceb31e7e6d5c2bc642bb253f32ccc07b6320c5db8d97f42
sha512 98a4c6a6d65d54675c75fa960920c5dcc4f6a4aab21af939da5ddda01b7079e06af8f16bc416d418bfedf2d99ae8c66f78a299f8049c1162b5343aa6133bc951
ripemd-160 606b67eb74fa7bc395e93abf65e5d55263da237f

81445820 as geometric shapes

Circle

Radius = n
Diameter 162891640
Circumference 511739179.55519
Area 2.08395085525E+16

Sphere

Radius = n
Volume 2.2630544832738E+24
Surface area 8.335803421E+16
Circumference 511739179.55519

Square

Length = n
Perimeter 325783280
Area 6633421595472400
Diagonal 115181783.2426

Cube

Length = n
Surface area 39800529572834400
Volume 5.4026446124896E+23
Space diagonal 141068298.30411

Equilateral Triangle

Length = n
Perimeter 244337460
Area 2.8723558078457E+15
Altitude 70534149.152055

Triangular Pyramid

Length = n
Surface area 2.8723558078457E+15
Volume 6.3670777363872E+22
Height 38393927.747533