Math question: How many times does the digit 3 appear when counting from 1 to 3871?

To find the number of times 3 appears, we can consider the different digits separately. The units digit 3 occurs once every ten numbers (3, 13, 23, ...). As we count to 3871, there are 387 such cases. The tens digit 3 appears once every 100 numbers as a number ranging from 30 to 39, so there are 38 cases. Similarly, the hundreds digit 3 appears between 300 and 399, resulting in 90 cases. However, the thousands digit 3 only appears once (3871). Therefore, the digit 3 occurs 387 + 38 + 90 + 1 = 516 times in the range 1 to 3871.

What is the sum of all the digits in the number 3871 divided by the product of its digits, rounded to the nearest whole number?

The sum of the digits in 3871 is 3 + 8 + 7 + 1 = 19. The product of the digits is 3 × 8 × 7 × 1 = 168. Dividing 19 by 168 equals 0.1131 (rounded to four decimal places). Rounded to the nearest whole number, the answer is 0. Hence, the result is 0.

Question: If 3871 is divided by 9, multiplied by 25, and then the square root is taken, what is the result?

To find the result, we first divide 3871 by 9 to obtain 430.1111. Next, we multiply this value by 25, giving us 10752.7777. Finally, taking the square root of this gives approximately 103.7101. Therefore, the result of the given operation is approximately 103.7101.

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

3871 (number)

3871 is an odd 4-digits composite number following 3870 and preceding 3872. In scientific notation, it is written as 3.871 × 10^3. The sum of its digits is 19. It has a total of 2 prime factors and 4 positive divisors. There are 3276 positive integers (up to 3871) that are relatively prime to 3871.

Interesting facts

3871 has 4 divisors, whose sum is 4000
The reverse of 3871 is 1783
Previous prime number is 49

Basic properties

Is Prime? no
Number parity odd
Number length 4
Sum of Digits 19
Digital Root 1

Name

Name	three thousand eight hundred seventy-one

Notation

Scientific notation	3.871 × 10^3
Engineering notation	3.871 × 10^3

Prime Factorization of 3871

Prime Factorization 49 × 79

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	3871	Product of the distinct prime numbers

The prime factorization of 3871 is 49 × 79. Since it has a total of 2 prime factors.

Most popular turbo-numbers

10, 2, 74, 98, 11, 363, 5578, 8430, 91956, 50449, 506026, 730806, 353247, 9655541, 56327830, 27862483, 798408612, 946390653, 9291759702, 525484315

Basic calculations (n = 3871)

Multiplication

n×y

n×2	7742
n×3	11613
n×4	15484
n×5	19355

Division

n÷y

n÷2	1935.5
n÷3	1290.3333333333
n÷3	967.75
n÷5	774.2

Exponentiation

n^y

n²	14984641
n³	58005545311
n⁴	224539465898881
n⁵	869192272494568351

Nth Root

^y√n

²√n	62.217360921209
³√n	15.701496875414
⁴√n	7.8877982302547
⁵√n	5.2187276663993

Divisors of 3871

1, 49, 79, 3871

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	-3870	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 3871 can be divided by 4 positive divisors. The sum of these divisors (counting 3871) is 1, the average is 0.25.

Base conversion 3871

Base	System	Value
2	Binary	111100011111
3	Ternary	12022101
4	Quaternary	330133
5	Quinary	110441
6	Senary	25531
8	Octal	7437
10	Decimal	3871
12	Duodecimal	22a7
16	Hexadecimal	f1f
20	Vigesimal	9db
36	Base36	2zj

Cryptographic Hash Functions

md5	551cb238f4895024b98d1943b708de7c
sha1	4fd67f03c9511028bb713318efc0e01917864e38
sha256	f6fea6270cfdd57f77ab1281acfdaa10c55586e8e855d5b86a3fd01a8b7ce61c
sha512	fca6103d74254164cb9be5ebee055c3ffbf4b548e658e7f7d195f8a16327a750833d333bd6c4b33c64c5d8618d305d7b19fadd62c7e77483d99d6d4f5ff49395
ripemd-160	fdfbd7ee4eb36db11aa01e898609fea4cc5c7c1e

3871 as geometric shapes

Circle

Radius = n

Diameter	7742
Circumference	24322.210324092
Area	47075638.08228

Sphere

Radius = n

Volume	242973060022.01
Surface area	188302552.32912
Circumference	24322.210324092

Square

Length = n

Perimeter	15484
Area	14984641
Diagonal	5474.4206999463

Cube

Length = n

Surface area	89907846
Volume	58005545311
Space diagonal	6704.7686760991

Equilateral Triangle

Length = n

Perimeter	11613
Area	6488539.8862949
Altitude	3352.3843380496

Triangular Pyramid

Length = n

Surface area	6488539.8862949
Volume	6836019072.6386
Height	1824.8068999821