128449905 is an odd 9-digits composite number following 128449904
and preceding 128449906 . In scientific notation, it is written as 1.28449905 × 10^8.
The sum of its digits is 42. It has a total of 4 prime factors and 16 positive divisors.
There are 68109248 positive integers (up to 128449905) that are relatively prime to 128449905.
128449905 has 16 divisors, whose sum is 206712000
The reverse of 128449905 is 509944821
Previous prime number is 173
Is Prime? no
Number parity odd
Number length 9
Sum of Digits 42
Digital Root 6
Name
one hundred twenty-eight million four hundred forty-nine thousand nine hundred five
Scientific notation
1.28449905 × 10^8
Engineering notation
1.28449905 × 10^6
Prime Factorization
3 × 5 × 173 × 49499
Composite number
ω
Distinct Factors
4
Total number of distinct prime factors
Ω
Total Factors
4
Total number of prime factors
rad
Radical
128449905
Product of the distinct prime numbers
The prime factorization of 128449905 is 3 × 5 × 173 × 49499.
Since it has a total of 4 prime factors.
7 , 9 , 38 , 74 , 288 , 558 , 6305 , 1339 , 43458 , 65348 , 269649 , 170356 , 8406916 , 7708006 , 52198936 , 69202131 , 313326617 , 500650453 , 2266241495 , 6950954280
n×2
256899810
n×3
385349715
n×4
513799620
n×5
642249525
n÷2
64224952.5
n÷3
42816635
n÷3
32112476.25
n÷5
25689981
n2
16499378094509025
n3
2.1193435487988E+24
n4
2.7222947750556E+32
n5
3.4967850523789E+40
2 √n
11333.574237636
3 √n
504.55819281502
4 √n
106.45926092941
5 √n
41.854943256147
1 , 3 , 5 , 15 , 173 , 519 , 865 , 2595 , 49499 , 148497 , 247495 , 742485 , 8563327 , 25689981 , 42816635 , 128449905
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
-128449904
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 128449905 can be divided by 16 positive divisors.
The sum of these divisors (counting 128449905) is 1, the average is 0.0625.
Base
System
Value
2
Binary
111101001111111110101110001
3
Ternary
22221200221010220
4
Quaternary
13221333311301
5
Quinary
230340344110
6
Senary
20425043253
8
Octal
751776561
10
Decimal
128449905
12
Duodecimal
37026529
16
Hexadecimal
7a7fd71
20
Vigesimal
202g4f5
36
Base36
24h4kx
md5
cc8ea5d865ed677de26e75eb77cee9a1
sha1
e6b8129b94aa55fb7375c68bc33adbd12add0674
sha256
632d369662356e7513f7d7bf43f83add6b004de5fde43b57d208f971326fff41
sha512
7c5002cc67085f17e301608c3d5037dd9f1d6ccce6fc5b82b9dbc932ef91981a6ef3d46447ac281051813a938a1bf1f341bea39a35d68b2653b942cef8409adf
ripemd-160
a2539bb20e50ee6f43094c61a5c5873eb6bc0e1b
Diameter
256899810
Circumference
807074555.80461
Area
5.183432501051E+16
Volume
8.8774854977855E+24
Surface area
2.0733730004204E+17
Circumference
807074555.80461
Perimeter
513799620
Area
16499378094509025
Diagonal
181655597.73654
Surface area
98996268567054150
Volume
2.1193435487988E+24
Space diagonal
222481761.6874
Perimeter
385349715
Area
7.1444402882446E+15
Altitude
111240880.8437
Surface area
7.1444402882446E+15
Volume
2.4976703250326E+23
Height
60551865.912179