128246987 is an odd 9-digits composite number following 128246986
and preceding 128246988 . In scientific notation, it is written as 1.28246987 × 10^8.
The sum of its digits is 47. It has a total of 2 prime factors and 4 positive divisors.
There are 116588160 positive integers (up to 128246987) that are relatively prime to 128246987.
128246987 has 4 divisors, whose sum is 139905816
The reverse of 128246987 is 789642821
Previous prime number is 11
Is Prime? no
Number parity odd
Number length 9
Sum of Digits 47
Digital Root 2
Name
one hundred twenty-eight million two hundred forty-six thousand nine hundred eighty-seven
Scientific notation
1.28246987 × 10^8
Engineering notation
1.28246987 × 10^6
Prime Factorization
11 × 11658817
Composite number
ω
Distinct Factors
2
Total number of distinct prime factors
Ω
Total Factors
2
Total number of prime factors
rad
Radical
128246987
Product of the distinct prime numbers
The prime factorization of 128246987 is 11 × 11658817.
Since it has a total of 2 prime factors.
8 , 4 , 100 , 38 , 450 , 139 , 3157 , 8553 , 57439 , 17792 , 947908 , 793894 , 1887917 , 1300183 , 19452062 , 8879515 , 335756543 , 578671399 , 8320588748 , 6854474198
n×2
256493974
n×3
384740961
n×4
512987948
n×5
641234935
n÷2
64123493.5
n÷3
42748995.666667
n÷3
32061746.75
n÷5
25649397.4
n2
16447289674578169
n3
2.1093153450809E+24
n4
2.7051333763949E+32
n5
3.4692520495578E+40
2 √n
11324.618624925
3 √n
504.29236181469
4 √n
106.41719139747
5 √n
41.841710870725
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
-128246986
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 128246987 can be divided by 4 positive divisors.
The sum of these divisors (counting 128246987) is 1, the average is 0.25.
Base
System
Value
2
Binary
111101001001110010011001011
3
Ternary
22221022121210102
4
Quaternary
13221032103023
5
Quinary
230312400422
6
Senary
20420440015
8
Octal
751162313
10
Decimal
128246987
12
Duodecimal
36b4900b
16
Hexadecimal
7a4e4cb
20
Vigesimal
201ah97
36
Base36
24cs0b
md5
24e0aa836f78eed532d4cf8a4d4ea72d
sha1
6be3dd726c08d66962b486b91329038bec42cc55
sha256
5fc2baab055ec4c0efbc668c3c76fb9c44974d6e2ae0589b3c5ce3d61486267a
sha512
ffde6769900bfcb79f55aa8739dd37c8b4a28a5437f35f5f17ccd39af1cc1f06157325140e3ba9bc727e4211811c138c8b7b465cf4794b3a675d872a29d9ef37
ripemd-160
8821c1e3d238a5603f1297e3c1c1f15ed52b3006
Diameter
256493974
Circumference
805799584.40845
Area
5.1670684413118E+16
Volume
8.8354794562803E+24
Surface area
2.0668273765247E+17
Circumference
805799584.40845
Perimeter
512987948
Area
16447289674578169
Diagonal
181368628.34889
Surface area
98683738047469014
Volume
2.1093153450809E+24
Space diagonal
222130297.40163
Perimeter
384740961
Area
7.1218853407931E+15
Altitude
111065148.70081
Surface area
7.1218853407931E+15
Volume
2.4858519736125E+23
Height
60456209.449629