28721856 (number)

28721856 is an even 8-digits composite number following 28721855 and preceding 28721857. In scientific notation, it is written as 2.8721856 × 10^7. The sum of its digits is 39. It has a total of 9 prime factors and 56 positive divisors. There are 9517312 positive integers (up to 28721856) that are relatively prime to 28721856.

Interesting facts

Basic properties

Name

Name twenty-eight million seven hundred twenty-one thousand eight hundred fifty-six

Notation

Scientific notation 2.8721856 × 10^7
Engineering notation 2.8721856 × 10^6

Prime Factorization of 28721856

Prime Factorization 2 × 2 × 2 × 2 × 2 × 2 × 3 × 227 × 659

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 9
Total number of prime factors
rad Radical 897558
Product of the distinct prime numbers

The prime factorization of 28721856 is 2 × 2 × 2 × 2 × 2 × 2 × 3 × 227 × 659. Since it has a total of 9 prime factors.

Most popular turbo-numbers

Basic calculations (n = 28721856)

Multiplication

n×y
n×2 57443712
n×3 86165568
n×4 114887424
n×5 143609280

Division

n÷y
n÷2 14360928
n÷3 9573952
n÷3 7180464
n÷5 5744371.2

Exponentiation

ny
n2 824945012084736
n3 2.3693951845016E+22
n4 6.8053427296349E+29
n5 1.9546207391122E+37

Nth Root

y√n
2√n 5359.2775632542
3√n 306.24628811272
4√n 73.207086837643
5√n 31.020050471254

Divisors of 28721856

56 divisors

τ Total Divisors 56
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -28721855
Sum of the proper positive divisors of n
A Arithmetic Mean 0.017857142857143
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 56
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 28721856 can be divided by 56 positive divisors. The sum of these divisors (counting 28721856) is 1, the average is 0.017857142857143.

Base conversion 28721856

Base System Value
2 Binary 1101101100100001011000000
3 Ternary 2000001012222110
4 Quaternary 1231210023000
5 Quinary 24323044411
6 Senary 2503335320
8 Octal 155441300
10 Decimal 28721856
12 Duodecimal 9751540
16 Hexadecimal 1b642c0
20 Vigesimal 8ja4cg
36 Base36 h3lxc

Cryptographic Hash Functions

md5 da2fea65e760eff839552ba5d67d836d
sha1 da50d6720fc902a2cceb347d0ac1e8189aac31c2
sha256 9f149b684840381e3302f9f58112c9b6b0f3fbafa61fb72e7be0a9117c3a7297
sha512 3f636616b19f11bb6432cd8fae8a6ef97fe9161d1be25e066a99a1afc30d5b46bda0848bbd551a9c67fe73885c8f0c2122bfab260d2e9c6f6acff93e75b55644
ripemd-160 98a43f3c06b46c5bebf4c94d3270ea8e367e6d24

28721856 as geometric shapes

Circle

Radius = n
Diameter 57443712
Circumference 180464743.61413
Area 2.5916411895809E+15

Sphere

Radius = n
Volume 9.9248993401084E+22
Surface area 1.0366564758324E+16
Circumference 180464743.61413

Square

Length = n
Perimeter 114887424
Area 824945012084736
Diagonal 40618838.291727

Cube

Length = n
Surface area 4949670072508416
Volume 2.3693951845016E+22
Space diagonal 49747713.879677

Equilateral Triangle

Length = n
Perimeter 86165568
Area 3.5721166859532E+14
Altitude 24873856.939838

Triangular Pyramid

Length = n
Surface area 3.5721166859532E+14
Volume 2.7923590037864E+21
Height 13539612.763909