2645 (number)

2645 is an odd 4-digits composite number following 2644 and preceding 2646. In scientific notation, it is written as 2.645 × 10^3. The sum of its digits is 17. It has a total of 3 prime factors and 6 positive divisors. There are 2024 positive integers (up to 2645) that are relatively prime to 2645.

Interesting facts

Basic properties

Name

Name two thousand six hundred forty-five

Notation

Scientific notation 2.645 × 10^3
Engineering notation 2.645 × 10^3

Prime Factorization of 2645

Prime Factorization 5 × 23 × 23

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 3
Total number of prime factors
rad Radical 115
Product of the distinct prime numbers

The prime factorization of 2645 is 5 × 23 × 23. Since it has a total of 3 prime factors.

Most popular turbo-numbers

Basic calculations (n = 2645)

Multiplication

n×y
n×2 5290
n×3 7935
n×4 10580
n×5 13225

Division

n÷y
n÷2 1322.5
n÷3 881.66666666667
n÷3 661.25
n÷5 529

Exponentiation

ny
n2 6996025
n3 18504486125
n4 48944365800625
n5 129457847542653125

Nth Root

y√n
2√n 51.429563482495
3√n 13.829566239282
4√n 7.171440823328
5√n 4.8359871174255

Divisors of 2645

1, 5, 23, 115, 529, 2645

6 divisors

τ Total Divisors 6
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -2644
Sum of the proper positive divisors of n
A Arithmetic Mean 0.16666666666667
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 6
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 2645 can be divided by 6 positive divisors. The sum of these divisors (counting 2645) is 1, the average is 0.16666666666667.

Base conversion 2645

Base System Value
2 Binary 101001010101
3 Ternary 10121222
4 Quaternary 221111
5 Quinary 41040
6 Senary 20125
8 Octal 5125
10 Decimal 2645
12 Duodecimal 1645
16 Hexadecimal a55
20 Vigesimal 6c5
36 Base36 21h

Cryptographic Hash Functions

md5 a7789ef88d599b8df86bbee632b2994d
sha1 3e2feb47655ed2eb9623395ebfa3b54bdc7d2b7d
sha256 c63bd0d975c69098ee4739650068349dd2812231b5b0a17c0772093ef07bbebd
sha512 61a3cf9442941c11251ed92f777e9bc3893790117251a4a97c8968f7d3c3adf8dd43b8ee8ca9bdbe9ad21a5707711b87b95ad9901b0066ca09dce077fae68557
ripemd-160 20499d3a0aa5e91a602ad3684b9ae0c3965341bb

2645 as geometric shapes

Circle

Radius = n
Diameter 5290
Circumference 16619.02513749
Area 21978660.744331

Sphere

Radius = n
Volume 77511410225.006
Surface area 87914642.977322
Circumference 16619.02513749

Square

Length = n
Perimeter 10580
Area 6996025
Diagonal 3740.5948724768

Cube

Length = n
Surface area 41976150
Volume 18504486125
Space diagonal 4581.2743860197

Equilateral Triangle

Length = n
Perimeter 7935
Area 3029367.6877555
Altitude 2290.6371930098

Triangular Pyramid

Length = n
Surface area 3029367.6877555
Volume 2180774603.56
Height 1246.8649574923