81444987 (number)

81444987 is an odd 8-digits composite number following 81444986 and preceding 81444988. In scientific notation, it is written as 8.1444987 × 10^7. The sum of its digits is 45. It has a total of 6 prime factors and 32 positive divisors. There are 50083488 positive integers (up to 81444987) that are relatively prime to 81444987.

Interesting facts

Basic properties

Name

Name eighty-one million four hundred forty-four thousand nine hundred eighty-seven

Notation

Scientific notation 8.1444987 × 10^7
Engineering notation 8.1444987 × 10^6

Prime Factorization of 81444987

Prime Factorization 9 × 3 × 13 × 13 × 13 × 1373

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 6
Total number of prime factors
rad Radical 481923
Product of the distinct prime numbers

The prime factorization of 81444987 is 9 × 3 × 13 × 13 × 13 × 1373. Since it has a total of 6 prime factors.

Most popular turbo-numbers

4, 3, 42, 88, 7, 540, 2056, 7227, 75169, 20812, 357534, 896265, 3917179, 686038, 15385458, 81662441, 645075083, 885601684, 6685791542, 1780273108

Basic calculations (n = 81444987)

Multiplication

n×y
n×2 162889974
n×3 244334961
n×4 325779948
n×5 407224935

Division

n÷y
n÷2 40722493.5
n÷3 27148329
n÷3 20361246.75
n÷5 16288997.4

Exponentiation

ny
n2 6633285907430169
n3 5.4024788449793E+23
n4 4.4000481929712E+31
n5 3.5836186787591E+39

Nth Root

y√n
2√n 9024.6876400239
3√n 433.46574842225
4√n 94.998355985901
5√n 38.209633467464

Divisors of 81444987

1, 3, 9, 13, 27, 39, 117, 169, 351, 507, 1373, 1521, 2197, 4119, 4563, 6591, 12357, 17849, 19773, 37071, 53547, 59319, 160641, 232037, 481923, 696111, 2088333, 3016481, 6264999, 9049443, 27148329, 81444987

32 divisors

τ Total Divisors 32
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81444986
Sum of the proper positive divisors of n
A Arithmetic Mean 0.03125
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 32
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81444987 can be divided by 32 positive divisors. The sum of these divisors (counting 81444987) is 1, the average is 0.03125.

Base conversion 81444987

Base System Value
2 Binary 100110110101100000001111011
3 Ternary 12200020211112000
4 Quaternary 10312230001323
5 Quinary 131322214422
6 Senary 12025352043
8 Octal 466540173
10 Decimal 81444987
12 Duodecimal 23338623
16 Hexadecimal 4dac07b
20 Vigesimal 1590c97
36 Base36 1chncr

Cryptographic Hash Functions

md5 18191c22c7613e4761bafd44e545f117
sha1 1d002125ee9d28addab82da9e9bb9a077270e93d
sha256 5725f49aa54aec799490fe6a2bbd9b724dd681bc7d90ae72d0a28be4d0adccbb
sha512 e0396236db5a13f69268281dc5a00750b77dcc714e17bf2b4c45b55f01edc44965e670a6ff584145d8b8c74a31945f1b7fa870caa03df7f1a3a023d7566f6945
ripemd-160 a54beac040109d757197e9eb39f553d09c7fa292

81444987 as geometric shapes

Circle

Radius = n
Diameter 162889974
Circumference 511733945.66183
Area 2.0839082275943E+16

Sphere

Radius = n
Volume 2.2629850467415E+24
Surface area 8.3356329103773E+16
Circumference 511733945.66183

Square

Length = n
Perimeter 325779948
Area 6633285907430169
Diagonal 115180605.2027

Cube

Length = n
Surface area 39799715444581014
Volume 5.4024788449793E+23
Space diagonal 141066855.50579

Equilateral Triangle

Length = n
Perimeter 244334961
Area 2.8722970531999E+15
Altitude 70533427.752893

Triangular Pyramid

Length = n
Surface area 2.8722970531999E+15
Volume 6.3668823775029E+22
Height 38393535.067567