Max	9223372036854775807
25835	Positive integer
0b10001100	Binary number
01771452	Octal number
0x129abf	Hex number
5.012 * 10^7	Scientific notation
2^4 * 5	Factorized form
*	Random number

81128918 (number)

81128918 is an even 8-digits composite number following 81128917 and preceding 81128919. In scientific notation, it is written as 8.1128918 × 10^7. The sum of its digits is 38. It has a total of 4 prime factors and 16 positive divisors. There are 37099296 positive integers (up to 81128918) that are relatively prime to 81128918.

Interesting facts

81128918 has 16 divisors, whose sum is 132261360
The reverse of 81128918 is 81982118
Previous prime number is 109

Basic properties

Is Prime? no
Number parity even
Number length 8
Sum of Digits 38
Digital Root 2

Name

Name	eighty-one million one hundred twenty-eight thousand nine hundred eighteen

Notation

Scientific notation	8.1128918 × 10^7
Engineering notation	8.1128918 × 10^6

Prime Factorization of 81128918

Prime Factorization 2 × 13 × 109 × 28627

Composite number

ω	Distinct Factors	4	Total number of distinct prime factors
Ω	Total Factors	4	Total number of prime factors
rad	Radical	81128918	Product of the distinct prime numbers

The prime factorization of 81128918 is 2 × 13 × 109 × 28627. Since it has a total of 4 prime factors.

Most popular turbo-numbers

5, 10, 19, 74, 863, 535, 854, 8795, 3282, 57237, 527076, 193682, 480286, 2252612, 88981727, 15361307, 254054549, 825616494, 1604072945, 8001730796

Basic calculations (n = 81128918)

Multiplication

n×y

n×2	162257836
n×3	243386754
n×4	324515672
n×5	405644590

Division

n÷y

n÷2	40564459
n÷3	27042972.666667
n÷3	20282229.5
n÷5	16225783.6

Exponentiation

n^y

n²	6581901335850724
n³	5.3398253376032E+23
n⁴	4.3321425194874E+31
n⁵	3.514620352278E+39

Nth Root

^y√n

²√n	9007.159263608
³√n	432.90429501243
⁴√n	94.90605493649
⁵√n	38.179930788688

Divisors of 81128918

1, 2, 13, 26, 109, 218, 1417, 2834, 28627, 57254, 372151, 744302, 3120343, 6240686, 40564459, 81128918

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	-81128917	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 81128918 can be divided by 16 positive divisors. The sum of these divisors (counting 81128918) is 1, the average is 0.0625.

Base conversion 81128918

Base	System	Value
2	Binary	100110101011110110111010110
3	Ternary	12122122202221202
4	Quaternary	10311132313112
5	Quinary	131232111133
6	Senary	12014512502
8	Octal	465366726
10	Decimal	81128918
12	Duodecimal	23205732
16	Hexadecimal	4d5edd6
20	Vigesimal	157125i
36	Base36	1cavh2

Cryptographic Hash Functions

md5	91fcc4a06c18db387779284519991c42
sha1	7c0d894cb422007b1b014ffd619e32a493486dea
sha256	b913bcab66f1f36b45b64d47fbf336264b3f5e4cb0d02cbf2d6e459712952947
sha512	ca65a4ec788954dbbed73f82c6b5de93ce8596967460eb66bc0f096b30ebb33f58c849710ab98c71234d31f50c42600b0e582d2a44d0ee2870ef58b793ea0f2a
ripemd-160	1a88d64df4ae8fbb02c615038e68fd3563907fbc

81128918 as geometric shapes

Circle

Radius = n

Diameter	162257836
Circumference	509748025.56498
Area	2.0677652883361E+16

Sphere

Radius = n

Volume	2.2367408069423E+24
Surface area	8.2710611533446E+16
Circumference	509748025.56498

Square

Length = n

Perimeter	324515672
Area	6581901335850724
Diagonal	114733616.13625

Cube

Length = n

Surface area	39491408015104344
Volume	5.3398253376032E+23
Space diagonal	140519407.93909

Equilateral Triangle

Length = n

Perimeter	243386754
Area	2.8500468810247E+15
Altitude	70259703.969545

Triangular Pyramid

Length = n

Surface area	2.8500468810247E+15
Volume	6.2930445109517E+22
Height	38244538.712085