1280 (number)

1280 is an even 4-digits composite number following 1279 and preceding 1281. In scientific notation, it is written as 1.280 × 10^3. The sum of its digits is 11. It has a total of 9 prime factors and 18 positive divisors. There are 512 positive integers (up to 1280) that are relatively prime to 1280.

Interesting facts

Basic properties

Name

Name one thousand two hundred eighty

Notation

Scientific notation 1.280 × 10^3
Engineering notation 1.280 × 10^3

Prime Factorization of 1280

Prime Factorization 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 5

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 9
Total number of prime factors
rad Radical 10
Product of the distinct prime numbers

The prime factorization of 1280 is 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 5. Since it has a total of 9 prime factors.

Most popular turbo-numbers

10, 10, 77, 51, 449, 463, 5273, 9713, 60171, 66272, 330703, 685168, 9236451, 3039005, 85480797, 95189229, 277939737, 681785645, 5774345965, 4177374160

Basic calculations (n = 1280)

Multiplication

n×y
n×2 2560
n×3 3840
n×4 5120
n×5 6400

Division

n÷y
n÷2 640
n÷3 426.66666666667
n÷3 320
n÷5 256

Exponentiation

ny
n2 1638400
n3 2097152000
n4 2684354560000
n5 3435973836800000

Nth Root

y√n
2√n 35.777087639997
3√n 10.85767046638
4√n 5.9813951248849
5√n 4.1825582103651

Divisors of 1280

1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280

18 divisors

τ Total Divisors 18
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -1279
Sum of the proper positive divisors of n
A Arithmetic Mean 0.055555555555556
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 18
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 1280 can be divided by 18 positive divisors. The sum of these divisors (counting 1280) is 1, the average is 0.055555555555556.

Base conversion 1280

Base System Value
2 Binary 10100000000
3 Ternary 1202102
4 Quaternary 110000
5 Quinary 20110
6 Senary 5532
8 Octal 2400
10 Decimal 1280
12 Duodecimal 8a8
16 Hexadecimal 500
20 Vigesimal 340
36 Base36 zk

Cryptographic Hash Functions

md5 da11e8cd1811acb79ccf0fd62cd58f86
sha1 9a6b59da46371d86eb75259c956aee4b580c0119
sha256 6f13d39f5c4665967f7df9f2f7311187fda905292da1a5a7cef66dd8cb6e9dd8
sha512 cdd61fc4e028562ebdaf6aa9bad532ad5307847be1c1954bbec3589a645374c5357f67c23612e516aa730cada1fc3479599b00687a8cea999eaf4f45f563b21b
ripemd-160 473f4ae083117268c6ebac45b215adb45d674192

1280 as geometric shapes

Circle

Radius = n
Diameter 2560
Circumference 8042.4771931899
Area 5147185.4036415

Sphere

Radius = n
Volume 8784529755.5482
Surface area 20588741.614566
Circumference 8042.4771931899

Square

Length = n
Perimeter 5120
Area 1638400
Diagonal 1810.1933598376

Cube

Length = n
Surface area 9830400
Volume 2097152000
Space diagonal 2217.0250336882

Equilateral Triangle

Length = n
Perimeter 3840
Area 709448.01078021
Altitude 1108.5125168441

Triangular Pyramid

Length = n
Surface area 709448.01078021
Volume 247151733.39649
Height 603.39778661252