81808428 (number)

81808428 is an even 8-digits composite number following 81808427 and preceding 81808429. In scientific notation, it is written as 8.1808428 × 10^7. The sum of its digits is 39. It has a total of 5 prime factors and 24 positive divisors. There are 25171776 positive integers (up to 81808428) that are relatively prime to 81808428.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 8.1808428 × 10^7
Engineering notation 8.1808428 × 10^6

Prime Factorization of 81808428

Prime Factorization 2 × 2 × 3 × 13 × 524413

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 40904214
Product of the distinct prime numbers

The prime factorization of 81808428 is 2 × 2 × 3 × 13 × 524413. Since it has a total of 5 prime factors.

Most popular turbo-numbers

1, 9, 39, 23, 974, 594, 4253, 4378, 86890, 12290, 633742, 405550, 394061, 8714775, 66900570, 11442838, 510105751, 588703338, 1199251390, 3543016106

Basic calculations (n = 81808428)

Multiplication

n×y
n×2 163616856
n×3 245425284
n×4 327233712
n×5 409042140

Division

n÷y
n÷2 40904214
n÷3 27269476
n÷3 20452107
n÷5 16361685.6

Exponentiation

ny
n2 6692618891831184
n3 5.4751263074381E+23
n4 4.4791147631296E+31
n5 3.6642933760322E+39

Nth Root

y√n
2√n 9044.8011586767
3√n 434.1095591513
4√n 95.104159523528
5√n 38.243674177304

Divisors of 81808428

1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 78, 156, 524413, 1048826, 1573239, 2097652, 3146478, 6292956, 6817369, 13634738, 20452107, 27269476, 40904214, 81808428

24 divisors

τ Total Divisors 24
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81808427
Sum of the proper positive divisors of n
A Arithmetic Mean 0.041666666666667
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 24
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81808428 can be divided by 24 positive divisors. The sum of these divisors (counting 81808428) is 1, the average is 0.041666666666667.

Base conversion 81808428

Base System Value
2 Binary 100111000000100110000101100
3 Ternary 12200221022001210
4 Quaternary 10320010300230
5 Quinary 131420332203
6 Senary 12041234420
8 Octal 470046054
10 Decimal 81808428
12 Duodecimal 23492a10
16 Hexadecimal 4e04c2c
20 Vigesimal 15b6118
36 Base36 1cpfsc

Cryptographic Hash Functions

md5 aea7007be226c78c2731e9d1d01e4966
sha1 f72fa6a5d7bbc60241a0e402091fc8d4322b8caf
sha256 429b49166084f64bd81af310eb3e61411de82538d248da30f5b7319a385e414e
sha512 7c3bb96d0ed9004d62a2983470414021e4077421a32da88a9778edc9a2b4122f33702ef5b31eeca9e5eabc7268b0a3c30bcc92963c039ea3be86eb23f308a422
ripemd-160 6cf0b6aa49c7cc069884c84e20b6d89919b2844a

81808428 as geometric shapes

Circle

Radius = n
Diameter 163616856
Circumference 514017512.81306
Area 2.1025482343853E+16

Sphere

Radius = n
Volume 2.2934155446565E+24
Surface area 8.4101929375412E+16
Circumference 514017512.81306

Square

Length = n
Perimeter 327233712
Area 6692618891831184
Diagonal 115694588.39402

Cube

Length = n
Surface area 40155713350987104
Volume 5.4751263074381E+23
Space diagonal 141696353.78334

Equilateral Triangle

Length = n
Perimeter 245425284
Area 2.8979889890867E+15
Altitude 70848176.89167

Triangular Pyramid

Length = n
Surface area 2.8979889890867E+15
Volume 6.4524982330706E+22
Height 38564862.798008