Math question: A number is divisible by 10 and 41. If the first digit is equal to triple the last digit, and the sum of its digits is 11, what is the number?

Let the number be represented as ABC, where A is the thousands digit, B is the hundreds digit, and C is the units digit. From the given conditions, we have A=3C, and A+B+C=11. To find the value of C, we substitute A=3C into the second equation: 3C + B + C = 11 Combining like terms, we get 4C + B = 11. Now, since the number is divisible by 10, the units digit C must be 0 or 5. Plugging in both values, we find that only when C=5, B=1, A=15, the number satisfies all the conditions. Therefore, the number is 1510.

Math question: What is the sum of all the prime numbers between 1 and 1640?

To find the sum of prime numbers between 1 and 1640, we need to identify all primes in that range and add them up. The prime numbers in the given range are: 2, 3, 5, 7, 11, 13, 17, 19, 23, and so on. By adding these numbers, we can find the sum. The sum of the prime numbers between 1 and 1640 is 258,155.

Question: If 25% of a number is 410, what is the number?

To find the number, we can set up the equation 0.25x = 410, where x represents the unknown number. To solve this equation, we divide both sides by 0.25, which yields x = 1640 as the solution. Therefore, the number is 1640.

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

1640 (number)

1640 is an even 4-digits composite number following 1639 and preceding 1641. In scientific notation, it is written as 1.640 × 10^3. The sum of its digits is 11. It has a total of 5 prime factors and 16 positive divisors. There are 640 positive integers (up to 1640) that are relatively prime to 1640.

Interesting facts

1640 has 16 divisors, whose sum is 3780
The reverse of 1640 is 0461
Previous prime number is 5

Basic properties

Is Prime? no
Number parity even
Number length 4
Sum of Digits 11
Digital Root 2

Name

Name	one thousand six hundred forty

Notation

Scientific notation	1.640 × 10^3
Engineering notation	1.640 × 10^3

Prime Factorization of 1640

Prime Factorization 2 × 2 × 2 × 5 × 41

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	5	Total number of prime factors
rad	Radical	410	Product of the distinct prime numbers

The prime factorization of 1640 is 2 × 2 × 2 × 5 × 41. Since it has a total of 5 prime factors.

Most popular turbo-numbers

9, 8, 61, 84, 107, 297, 5889, 3380, 11561, 9399, 540332, 698059, 6855848, 2725225, 11746638, 50019772, 342037626, 313788570, 5975392670, 4654173742

Basic calculations (n = 1640)

Multiplication

n×y

n×2	3280
n×3	4920
n×4	6560
n×5	8200

Division

n÷y

n÷2	820
n÷3	546.66666666667
n÷3	410
n÷5	328

Exponentiation

n^y

n²	2689600
n³	4410944000
n⁴	7233948160000
n⁵	11863674982400000

Nth Root

^y√n

²√n	40.496913462633
³√n	11.792737079941
⁴√n	6.3637185247804
⁵√n	4.3951000885912

Divisors of 1640

1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640

16 divisors

τ	Total Divisors	16	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-1639	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.0625	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	16	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 1640 can be divided by 16 positive divisors. The sum of these divisors (counting 1640) is 1, the average is 0.0625.

Base conversion 1640

Base	System	Value
2	Binary	11001101000
3	Ternary	2020202
4	Quaternary	121220
5	Quinary	23030
6	Senary	11332
8	Octal	3150
10	Decimal	1640
12	Duodecimal	b48
16	Hexadecimal	668
20	Vigesimal	420
36	Base36	19k

Cryptographic Hash Functions

md5	84f0f20482cde7e5eacaf7364a643d33
sha1	89d89e5773c4210782aa5783b7dfba5e0af85ccc
sha256	cdbe4e7e26e3a55307dac9da65edc0d33fa6b54f79a83373cb997770856c23bd
sha512	0cbd9735e463305a3833f113c0d5669a601cbec557f42fca9d5179908ceb3f233876bd9519dbea4adbc9fd75f537bd2cabda86b1776e196d9bf1d92f54ffaaed
ripemd-160	00ce6fe704b7dc4d01c155f47e3c3a54af9184ea

1640 as geometric shapes

Circle

Radius = n

Diameter	3280
Circumference	10304.423903775
Area	8449627.6010951

Sphere

Radius = n

Volume	18476519021.061
Surface area	33798510.40438
Circumference	10304.423903775

Square

Length = n

Perimeter	6560
Area	2689600
Diagonal	2319.3102422919

Cube

Length = n

Surface area	16137600
Volume	4410944000
Space diagonal	2840.563324413

Equilateral Triangle

Length = n

Perimeter	4920
Area	1164630.9630093
Altitude	1420.2816622065

Triangular Pyramid

Length = n

Surface area	1164630.9630093
Volume	519834735.63902
Height	773.10341409729