81638897 (number)

81638897 is an odd 8-digits composite number following 81638896 and preceding 81638898. In scientific notation, it is written as 8.1638897 × 10^7. The sum of its digits is 50. It has a total of 3 prime factors and 8 positive divisors. There are 78430968 positive integers (up to 81638897) that are relatively prime to 81638897.

Interesting facts

Basic properties

Name

Name eighty-one million six hundred thirty-eight thousand eight hundred ninety-seven

Notation

Scientific notation 8.1638897 × 10^7
Engineering notation 8.1638897 × 10^6

Prime Factorization of 81638897

Prime Factorization 2881 × 43 × 659

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 3
Total number of prime factors
rad Radical 81638897
Product of the distinct prime numbers

The prime factorization of 81638897 is 2881 × 43 × 659. Since it has a total of 3 prime factors.

Most popular turbo-numbers

8, 8, 15, 26, 647, 528, 220, 39, 73705, 88310, 618086, 6824, 3510709, 5229053, 65073334, 29910895, 493442468, 689791229, 4553147002, 3692404094

Basic calculations (n = 81638897)

Multiplication

n×y
n×2 163277794
n×3 244916691
n×4 326555588
n×5 408194485

Division

n÷y
n÷2 40819448.5
n÷3 27212965.666667
n÷3 20409724.25
n÷5 16327779.4

Exponentiation

ny
n2 6664909503376609
n3 5.4411586046048E+23
n4 4.44210186882E+31
n5 3.626482969321E+39

Nth Root

y√n
2√n 9035.4245611371
3√n 433.80948443247
4√n 95.054850276759
5√n 38.227810605661

Divisors of 81638897

1, 43, 659, 2881, 28337, 123883, 1898579, 81638897

8 divisors

τ Total Divisors 8
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81638896
Sum of the proper positive divisors of n
A Arithmetic Mean 0.125
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 8
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81638897 can be divided by 8 positive divisors. The sum of these divisors (counting 81638897) is 1, the average is 0.125.

Base conversion 81638897

Base System Value
2 Binary 100110111011011010111110001
3 Ternary 12200121200111212
4 Quaternary 10313123113301
5 Quinary 131344421042
6 Senary 12033445505
8 Octal 467332761
10 Decimal 81638897
12 Duodecimal 23410895
16 Hexadecimal 4ddb5f1
20 Vigesimal 15a4h4h
36 Base36 1clsz5

Cryptographic Hash Functions

md5 42634d6574354a34003ff30cedbdb38d
sha1 35dccec8a19d53b0a6922cf82e45253be6c393b9
sha256 c2bfcf1b59cb4e260e0187eb218a124b45348596e8a9d69283d5523d65f5882d
sha512 2fd173fe6ec3a48492b91ee8785833a8ef11cdb80b0f7f507245fc9ee460617f1b8c60d8323ff82a6417196df5fbd8d66484ce8923c45c4f0081c159ab74f018
ripemd-160 a810a63fa013c2b6ffdec4c0e9f8c11569bc8e4b

81638897 as geometric shapes

Circle

Radius = n
Diameter 163277794
Circumference 512952318.12475
Area 2.0938430732649E+16

Sphere

Radius = n
Volume 2.2791871865658E+24
Surface area 8.3753722930595E+16
Circumference 512952318.12475

Square

Length = n
Perimeter 326555588
Area 6664909503376609
Diagonal 115454835.35458

Cube

Length = n
Surface area 39989457020259654
Volume 5.4411586046048E+23
Space diagonal 141402717.47788

Equilateral Triangle

Length = n
Perimeter 244916691
Area 2.8859904719242E+15
Altitude 70701358.738941

Triangular Pyramid

Length = n
Surface area 2.8859904719242E+15
Volume 6.4124669113794E+22
Height 38484945.118193