Math question: If a number is divisible by both 7 and 13, and the sum of its digits is 20, what is the largest possible number less than or equal to 1838 that satisfies these conditions?

To find the largest possible number less than or equal to 1838 that is divisible by 7 and 13 while having a digit sum of 20, we can start by listing the multiples of 7 and 13. We observe that 91 is the lowest common multiple of 7 and 13, so we search for a multiple of 91 that has a digit sum of 20. After some calculations, we find that 1001 is the smallest such number, but it exceeds 1838. However, 1820 is divisible by both 7 and 13 and has a digit sum of 11. By adding 217 (a multiple of 7) to 1820, we get 2037, which has a digit sum of 12. Continuing this pattern, after adding 224, 231, and finally 238, we obtain 2058, 2125, and 2192, respectively. Checking each of these numbers, we find that 2125 is the largest valid number less than or equal to 1838. Thus, the answer is 2125.

Question: If you add the sum of the digits of the number 1838 to the product of its digits, what is the result?

To find the sum of the digits, we add 1 + 8 + 3 + 8 = 20. Then, the product of the digits is 1 * 8 * 3 * 8 = 192. Now, if we add the sum (20) to the product (192), we get 20 + 192 = 212. Therefore, the result is 212.

Math question: If 1838 is divided by the sum of its digits, what is the result?

To find the sum of the digits, we add 1+8+3+8=20. Now dividing 1838 by 20, we get 91.9.

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

1838 (number)

1838 is an even 4-digits composite number following 1837 and preceding 1839. In scientific notation, it is written as 1.838 × 10^3. The sum of its digits is 20. It has a total of 2 prime factors and 4 positive divisors. There are 918 positive integers (up to 1838) that are relatively prime to 1838.

Interesting facts

1838 has 4 divisors, whose sum is 2760
The reverse of 1838 is 8381
Previous prime number is 2

Basic properties

Is Prime? no
Number parity even
Number length 4
Sum of Digits 20
Digital Root 2

Name

Name	one thousand eight hundred thirty-eight

Notation

Scientific notation	1.838 × 10^3
Engineering notation	1.838 × 10^3

Prime Factorization of 1838

Prime Factorization 2 × 919

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	1838	Product of the distinct prime numbers

The prime factorization of 1838 is 2 × 919. Since it has a total of 2 prime factors.

Most popular turbo-numbers

2, 8, 71, 65, 933, 591, 1922, 5788, 31670, 47241, 144075, 787499, 1765193, 9409579, 74536174, 20866491, 769262912, 568169312, 5189315242, 8993922077

Basic calculations (n = 1838)

Multiplication

n×y

n×2	3676
n×3	5514
n×4	7352
n×5	9190

Division

n÷y

n÷2	919
n÷3	612.66666666667
n÷3	459.5
n÷5	367.6

Exponentiation

n^y

n²	3378244
n³	6209212472
n⁴	11412532523536
n⁵	20976234778259168

Nth Root

^y√n

²√n	42.871902220452
³√n	12.249409939647
⁴√n	6.547663875036
⁵√n	4.4964430936035

Divisors of 1838

1, 2, 919, 1838

4 divisors

τ	Total Divisors	4	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-1837	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.25	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	4	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 1838 can be divided by 4 positive divisors. The sum of these divisors (counting 1838) is 1, the average is 0.25.

Base conversion 1838

Base	System	Value
2	Binary	11100101110
3	Ternary	2112002
4	Quaternary	130232
5	Quinary	24323
6	Senary	12302
8	Octal	3456
10	Decimal	1838
12	Duodecimal	1092
16	Hexadecimal	72e
20	Vigesimal	4bi
36	Base36	1f2

Cryptographic Hash Functions

md5	d7657583058394c828ee150fada65345
sha1	bc12d83eaae55aa090c7026f0dd3e2ebcccd95cf
sha256	23765fc69c4e3c0b10f5d15471dc2245e2a19af16b513f85aa4b83bd033762a4
sha512	d5155496fcc1ddbc6bac812f4748b940326dd19aa5548a3870c078d5053103d6502c9f78a14d81a5dc3edd264c21c62d0ef0a1223da85992b414557d43984bd7
ripemd-160	ad2f82953bf447a452effb76df8fdcc14a8aa228

1838 as geometric shapes

Circle

Radius = n

Diameter	3676
Circumference	11548.494594596
Area	10613066.532434

Sphere

Radius = n

Volume	26009088382.151
Surface area	42452266.129735
Circumference	11548.494594596

Square

Length = n

Perimeter	7352
Area	3378244
Diagonal	2599.3245276417

Cube

Length = n

Surface area	20269464
Volume	6209212472
Space diagonal	3183.5093843116

Equilateral Triangle

Length = n

Perimeter	5514
Area	1462822.5620912
Altitude	1591.7546921558

Triangular Pyramid

Length = n

Surface area	1462822.5620912
Volume	731762707.46321
Height	866.44150921392