28742721 (number)

28742721 is an odd 8-digits composite number following 28742720 and preceding 28742722. In scientific notation, it is written as 2.8742721 × 10^7. The sum of its digits is 33. It has a total of 4 prime factors and 16 positive divisors. There are 16386048 positive integers (up to 28742721) that are relatively prime to 28742721.

Interesting facts

Basic properties

Name

Name twenty-eight million seven hundred forty-two thousand seven hundred twenty-one

Notation

Scientific notation 2.8742721 × 10^7
Engineering notation 2.8742721 × 10^6

Prime Factorization of 28742721

Prime Factorization 3 × 7 × 509 × 2689

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 28742721
Product of the distinct prime numbers

The prime factorization of 28742721 is 3 × 7 × 509 × 2689. Since it has a total of 4 prime factors.

Most popular turbo-numbers

10, 3, 63, 12, 912, 108, 5218, 5998, 96045, 27861, 755712, 508662, 2628911, 3217231, 30492326, 71041429, 426044786, 90995143, 5817842692, 7236030432

Basic calculations (n = 28742721)

Multiplication

n×y
n×2 57485442
n×3 86228163
n×4 114970884
n×5 143713605

Division

n÷y
n÷2 14371360.5
n÷3 9580907
n÷3 7185680.25
n÷5 5748544.2

Exponentiation

ny
n2 826144010483841
n3 2.3745626799158E+22
n4 6.8251392605832E+29
n5 1.9617307355309E+37

Nth Root

y√n
2√n 5361.2238341632
3√n 306.32042772877
4√n 73.22037854425
5√n 31.024556067006

Divisors of 28742721

1, 3, 7, 21, 509, 1527, 2689, 3563, 8067, 10689, 18823, 56469, 1368701, 4106103, 9580907, 28742721

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 -28742720
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 28742721 can be divided by 16 positive divisors. The sum of these divisors (counting 28742721) is 1, the average is 0.0625.

Base conversion 28742721

Base System Value
2 Binary 1101101101001010001000001
3 Ternary 2000002021121020
4 Quaternary 1231221101001
5 Quinary 24324231341
6 Senary 2504020053
8 Octal 155512101
10 Decimal 28742721
12 Duodecimal 9761629
16 Hexadecimal 1b69441
20 Vigesimal 8jcgg1
36 Base36 h420x

Cryptographic Hash Functions

md5 a320f302537d2ba72064c5966b43aeb8
sha1 acd5149e66dd0a7b52b1c092cd92848d82fcb47e
sha256 495cce076aa02ee0f8db42dd3b165ea1fec80de7f09d82aa88d198898f83649a
sha512 7dff8787b043f3e919f51de4e15087c5bf893b5c621992a4bd20123f17c6c73a594a7f58fc4c23bf2572262a032f5307c251e7a86df738ab9e3a30906466fb0f
ripemd-160 451da2d53d1f0ae6b553ea53288a1dd966f32873

28742721 as geometric shapes

Circle

Radius = n
Diameter 57485442
Circumference 180595842.27556
Area 2.5954079541432E+15

Sphere

Radius = n
Volume 9.9465448942827E+22
Surface area 1.0381631816573E+16
Circumference 180595842.27556

Square

Length = n
Perimeter 114970884
Area 826144010483841
Diagonal 40648345.857706

Cube

Length = n
Surface area 4956864062903046
Volume 2.3745626799158E+22
Space diagonal 49783853.119777

Equilateral Triangle

Length = n
Perimeter 86228163
Area 3.5773085013168E+14
Altitude 24891926.559888

Triangular Pyramid

Length = n
Surface area 3.5773085013168E+14
Volume 2.798448955535E+21
Height 13549448.619235