81640245 (number)

81640245 is an odd 8-digits composite number following 81640244 and preceding 81640246. In scientific notation, it is written as 8.1640245 × 10^7. The sum of its digits is 30. It has a total of 4 prime factors and 16 positive divisors. There are 41249664 positive integers (up to 81640245) that are relatively prime to 81640245.

Interesting facts

Basic properties

Name

Name eighty-one million six hundred forty thousand two hundred forty-five

Notation

Scientific notation 8.1640245 × 10^7
Engineering notation 8.1640245 × 10^6

Prime Factorization of 81640245

Prime Factorization 3 × 5 × 19 × 286457

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81640245
Product of the distinct prime numbers

The prime factorization of 81640245 is 3 × 5 × 19 × 286457. Since it has a total of 4 prime factors.

Most popular turbo-numbers

3, 1, 53, 64, 942, 778, 1980, 1360, 68815, 98584, 30992, 235934, 2518434, 6738363, 39026198, 19354285, 943760360, 753885667, 8246786440, 8100723637

Basic calculations (n = 81640245)

Multiplication

n×y
n×2 163280490
n×3 244920735
n×4 326560980
n×5 408201225

Division

n÷y
n÷2 40820122.5
n÷3 27213415
n÷3 20410061.25
n÷5 16328049

Exponentiation

ny
n2 6665129603660025
n3 5.4414281379956E+23
n4 4.4423952633585E+31
n5 3.6267823768743E+39

Nth Root

y√n
2√n 9035.4991561064
3√n 433.81187206871
4√n 95.055242654503
5√n 38.227936846338

Divisors of 81640245

1, 3, 5, 15, 19, 57, 95, 285, 286457, 859371, 1432285, 4296855, 5442683, 16328049, 27213415, 81640245

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 -81640244
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 81640245 can be divided by 16 positive divisors. The sum of these divisors (counting 81640245) is 1, the average is 0.0625.

Base conversion 81640245

Base System Value
2 Binary 100110111011011101100110101
3 Ternary 12200121202100210
4 Quaternary 10313123230311
5 Quinary 131344441440
6 Senary 12033500033
8 Octal 467335465
10 Decimal 81640245
12 Duodecimal 23411619
16 Hexadecimal 4ddbb35
20 Vigesimal 15a50c5
36 Base36 1clu0l

Cryptographic Hash Functions

md5 eec1f2a37dea412175416629984a3e1c
sha1 4928c08727c27e9b7a7aac7884e79bf833f1728c
sha256 013010aad8bd4ebacba0fc25ba5c85af839465c79a673637338d88e48e83a0ed
sha512 85b8a54eda4b7f20d73f6ccee894b73fb0ffcd1edc7fd98e3c4da2743fc114225d7e4b5696971d563fa38fc104fdcba7ab202c5b3358e8e0d44f7f4f68eba165
ripemd-160 b7710f696c4467ed76d8ee0cde32f62803e8469c

81640245 as geometric shapes

Circle

Radius = n
Diameter 163280490
Circumference 512960787.85854
Area 2.0939122198082E+16

Sphere

Radius = n
Volume 2.2793000884485E+24
Surface area 8.3756488792329E+16
Circumference 512960787.85854

Square

Length = n
Perimeter 326560980
Area 6665129603660025
Diagonal 115456741.71446

Cube

Length = n
Surface area 39990777621960150
Volume 5.4414281379956E+23
Space diagonal 141405052.28237

Equilateral Triangle

Length = n
Perimeter 244920735
Area 2.8860857781426E+15
Altitude 70702526.141185

Triangular Pyramid

Length = n
Surface area 2.8860857781426E+15
Volume 6.4127845595266E+22
Height 38485580.571487