805 (number)

805 is an odd 3-digits composite number following 804 and preceding 806. In scientific notation, it is written as 8.05 × 10^2. The sum of its digits is 13. It has a total of 3 prime factors and 8 positive divisors. There are 528 positive integers (up to 805) that are relatively prime to 805.

Interesting facts

Basic properties

Name

Name eight hundred five

Notation

Scientific notation 8.05 × 10^2
Engineering notation 8.05 × 10^0

Prime Factorization of 805

Prime Factorization 7 × 5 × 23

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 3
Total number of prime factors
rad Radical 805
Product of the distinct prime numbers

The prime factorization of 805 is 7 × 5 × 23. Since it has a total of 3 prime factors.

Most popular turbo-numbers

5, 1, 71, 42, 762, 613, 2967, 4736, 47348, 61388, 418906, 714975, 8962775, 8316556, 54252404, 73928166, 655682909, 989331967, 8924943118, 7732164908

Basic calculations (n = 805)

Multiplication

n×y
n×2 1610
n×3 2415
n×4 3220
n×5 4025

Division

n÷y
n÷2 402.5
n÷3 268.33333333333
n÷3 201.25
n÷5 161

Exponentiation

ny
n2 648025
n3 521660125
n4 419936400625
n5 338048802503125

Nth Root

y√n
2√n 28.372521918222
3√n 9.3024774684502
4√n 5.3265863288059
5√n 3.812055158864

Divisors of 805

1, 5, 7, 23, 35, 115, 161, 805

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 -804
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 805 can be divided by 8 positive divisors. The sum of these divisors (counting 805) is 1, the average is 0.125.

Base conversion 805

Base System Value
2 Binary 1100100101
3 Ternary 1002211
4 Quaternary 30211
5 Quinary 11210
6 Senary 3421
8 Octal 1445
10 Decimal 805
12 Duodecimal 571
16 Hexadecimal 325
20 Vigesimal 205
36 Base36 md

Cryptographic Hash Functions

md5 846c260d715e5b854ffad5f70a516c88
sha1 f890d752d330caf426a52643f6510d6efd597f3e
sha256 d1c78c9aa5dcb0991f46b25fbaaa359d7d5823ac7a2a94c4d4a31da42a26c24f
sha512 1d3b704c2ae1cfa74d1ccffb40c980e5945c2008d4c0e83b4f656ab53085446bf6c9b7dddd3965c60468212878997a418f8bca204ac0e8d8de41573b69b9d54d
ripemd-160 6011a41cd00ee9835613a86e4c3f551dfb19ee2a

805 as geometric shapes

Circle

Radius = n
Diameter 1610
Circumference 5057.9641722796
Area 2035830.5793425

Sphere

Radius = n
Volume 2185124821.8276
Surface area 8143322.3173701
Circumference 5057.9641722796

Square

Length = n
Perimeter 3220
Area 648025
Diagonal 1138.4419177103

Cube

Length = n
Surface area 3888150
Volume 521660125
Space diagonal 1394.3009000929

Equilateral Triangle

Length = n
Perimeter 2415
Area 280603.05614371
Altitude 697.15045004647

Triangular Pyramid

Length = n
Surface area 280603.05614371
Volume 61478235.310354
Height 379.48063923678