Math question: A number when multiplied by 5 and divided by 2 is equal to 128. What is the number?

Let's denote the unknown number as x. According to the question, we have the equation (5x) / 2 = 128. To determine x, we can first simplify the equation: 5x = 2 * 128 5x = 256 Now, divide both sides of the equation by 5: x = 256 / 5 x = 51.2 Hence, the number is 51.2.

Question: In a certain sequence, the number 128 is multiplied by 5, then subtracted by 17, and the resulting value is divided by 8. What is the final value?

To calculate the final value, we follow the given sequence. First, we multiply 128 by 5 to get 640. Next, we subtract 17 from 640, resulting in 623. Finally, we divide 623 by 8, obtaining the final value of approximately 77.875.

Question: What is the value of 128 divided by 4, multiplied by 2, then added to 10, and finally subtracted by 3 to get the result?

To solve this, we can follow the given operations step by step. First, we divide 128 by 4, which gives us 32. Next, we multiply the result (32) by 2, obtaining 64. Then, we add 10 to this (64 + 10), giving us 74. Lastly, we subtract 3 from 74, resulting in an answer of 71. Therefore, the value of the expression is 71.

Max	9223372036854775807
25835	Positive integer
0b10001100	Binary number
01771452	Octal number
0x129abf	Hex number
5.012 * 10^7	Scientific notation
2^4 * 5	Factorized form
*	Random number

128 (number)

128 is an even 3-digits composite number following 127 and preceding 129. In scientific notation, it is written as 1.28 × 10^2. The sum of its digits is 11. It has a total of 7 prime factors and 8 positive divisors. There are 64 positive integers (up to 128) that are relatively prime to 128.

Interesting facts

128 has 8 divisors, whose sum is 255
The reverse of 128 is 821
Previous prime number is 2

Basic properties

Is Prime? no
Number parity even
Number length 3
Sum of Digits 11
Digital Root 2

Name

Name	one hundred twenty-eight

Notation

Scientific notation	1.28 × 10^2
Engineering notation	1.28 × 10^0

Prime Factorization of 128

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

Composite number

ω	Distinct Factors	1	Total number of distinct prime factors
Ω	Total Factors	7	Total number of prime factors
rad	Radical	2	Product of the distinct prime numbers

The prime factorization of 128 is 2 × 2 × 2 × 2 × 2 × 2 × 2. Since it has a total of 7 prime factors.

Most popular turbo-numbers

4, 1, 6, 83, 230, 717, 4261, 5083, 82656, 82360, 745949, 782803, 4818049, 5682320, 53407796, 53470115, 75551053, 292363078, 8515980298, 1770767653

Basic calculations (n = 128)

Multiplication

n×y

n×2	256
n×3	384
n×4	512
n×5	640

Division

n÷y

n÷2	64
n÷3	42.666666666667
n÷3	32
n÷5	25.6

Exponentiation

n^y

n²	16384
n³	2097152
n⁴	268435456
n⁵	34359738368

Nth Root

^y√n

²√n	11.313708498985
³√n	5.0396841995795
⁴√n	3.3635856610149
⁵√n	2.6390158215458

Divisors of 128

1, 2, 4, 8, 16, 32, 64, 128

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	-127	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 128 can be divided by 8 positive divisors. The sum of these divisors (counting 128) is 1, the average is 0.125.

Base conversion 128

Base	System	Value
2	Binary	10000000
3	Ternary	11202
4	Quaternary	2000
5	Quinary	1003
6	Senary	332
8	Octal	200
10	Decimal	128
12	Duodecimal	a8
16	Hexadecimal	80
20	Vigesimal	68
36	Base36	3k

Cryptographic Hash Functions

md5	76dc611d6ebaafc66cc0879c71b5db5c
sha1	b4182bff4b3cf75f9e54f4990f9bd153c0c2973c
sha256	2747b7c718564ba5f066f0523b03e17f6a496b06851333d2d59ab6d863225848
sha512	e2bc8ca53e630757ef4a3e8f3d0fc48aac10a66dbe6d14d759d00c21263f4c0623f6841dc3995081f97eff9641ea9be42c9219f66e6c5b9ea9effa1c8450c3fb
ripemd-160	4402187499f39c17addb5e85d3774f81fa2ab316

128 as geometric shapes

Circle

Radius = n

Diameter	256
Circumference	804.24771931899
Area	51471.854036415

Sphere

Radius = n

Volume	8784529.7555482
Surface area	205887.41614566
Circumference	804.24771931899

Square

Length = n

Perimeter	512
Area	16384
Diagonal	181.01933598376

Cube

Length = n

Surface area	98304
Volume	2097152
Space diagonal	221.70250336882

Equilateral Triangle

Length = n

Perimeter	384
Area	7094.4801078021
Altitude	110.85125168441

Triangular Pyramid

Length = n

Surface area	7094.4801078021
Volume	247151.73339649
Height	60.339778661252