81748891 (number)

81748891 is an odd 8-digits composite number following 81748890 and preceding 81748892. In scientific notation, it is written as 8.1748891 × 10^7. The sum of its digits is 46. It has a total of 4 prime factors and 16 positive divisors. There are 66225600 positive integers (up to 81748891) that are relatively prime to 81748891.

Interesting facts

Basic properties

Name

Name eighty-one million seven hundred forty-eight thousand eight hundred ninety-one

Notation

Scientific notation 8.1748891 × 10^7
Engineering notation 8.1748891 × 10^6

Prime Factorization of 81748891

Prime Factorization 7 × 31 × 43 × 8761

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81748891
Product of the distinct prime numbers

The prime factorization of 81748891 is 7 × 31 × 43 × 8761. Since it has a total of 4 prime factors.

Most popular turbo-numbers

7, 2, 44, 39, 887, 553, 2066, 4085, 3624, 21905, 111310, 286347, 6164314, 2114162, 56797613, 20778881, 716919654, 866443747, 7898065930, 9214657499

Basic calculations (n = 81748891)

Multiplication

n×y
n×2 163497782
n×3 245246673
n×4 326995564
n×5 408744455

Division

n÷y
n÷2 40874445.5
n÷3 27249630.333333
n÷3 20437222.75
n÷5 16349778.2

Exponentiation

ny
n2 6682881179729881
n3 5.4631812512769E+23
n4 4.4660900862388E+31
n5 3.6509791165612E+39

Nth Root

y√n
2√n 9041.5093319644
3√n 434.00422422924
4√n 95.086851519884
5√n 38.238106103709

Divisors of 81748891

1, 7, 31, 43, 217, 301, 1333, 8761, 9331, 61327, 271591, 376723, 1901137, 2637061, 11678413, 81748891

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 -81748890
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 81748891 can be divided by 16 positive divisors. The sum of these divisors (counting 81748891) is 1, the average is 0.0625.

Base conversion 81748891

Base System Value
2 Binary 100110111110110001110011011
3 Ternary 12200211021101201
4 Quaternary 10313312032123
5 Quinary 131411431031
6 Senary 12040055031
8 Octal 467661633
10 Decimal 81748891
12 Duodecimal 23464477
16 Hexadecimal 4df639b
20 Vigesimal 15aic4b
36 Base36 1co5uj

Cryptographic Hash Functions

md5 1dedf1c1a24a3eae130434df7e6a95da
sha1 405ce5b4e884abce27a6603459170a19ad8ef159
sha256 5f8938ddd818da688b1b688798df3906f23f164e97bcec26465551200921bbfa
sha512 9a3ebca1bce3b952274b6fec2d0cc6c326b3f9d281b13efbcd3da1f659528eb7eff43c59996f179d7b70230a3ab0521e9fde44d87a7150bcfd2051f35c9265d7
ripemd-160 739dbaf0fe00310f2ba6e1ff24dd61df3cb87587

81748891 as geometric shapes

Circle

Radius = n
Diameter 163497782
Circumference 513643430.80943
Area 2.0994890419053E+16

Sphere

Radius = n
Volume 2.2884120112321E+24
Surface area 8.3979561676212E+16
Circumference 513643430.80943

Square

Length = n
Perimeter 326995564
Area 6682881179729881
Diagonal 115610390.36116

Cube

Length = n
Surface area 40097287078379286
Volume 5.4631812512769E+23
Space diagonal 141593232.67441

Equilateral Triangle

Length = n
Perimeter 245246673
Area 2.8937724360595E+15
Altitude 70796616.337205

Triangular Pyramid

Length = n
Surface area 2.8937724360595E+15
Volume 6.4384208493818E+22
Height 38536796.787053