128697681 is an odd 9-digits composite number following 128697680
and preceding 128697682 . In scientific notation, it is written as 1.28697681 × 10^8.
The sum of its digits is 48. It has a total of 3 prime factors and 8 positive divisors.
There are 73541520 positive integers (up to 128697681) that are relatively prime to 128697681.
128697681 has 8 divisors, whose sum is 196110784
The reverse of 128697681 is 186796821
Previous prime number is 7
Is Prime? no
Number parity odd
Number length 9
Sum of Digits 48
Digital Root 3
Name
one hundred twenty-eight million six hundred ninety-seven thousand six hundred eighty-one
Scientific notation
1.28697681 × 10^8
Engineering notation
1.28697681 × 10^6
Prime Factorization
3 × 7 × 6128461
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
128697681
Product of the distinct prime numbers
The prime factorization of 128697681 is 3 × 7 × 6128461.
Since it has a total of 3 prime factors.
10 , 4 , 22 , 34 , 839 , 656 , 8571 , 363 , 87344 , 78666 , 534652 , 795477 , 387722 , 3551300 , 74689061 , 68268312 , 975371856 , 109225625 , 6564017591 , 842269619
n×2
257395362
n×3
386093043
n×4
514790724
n×5
643488405
n÷2
64348840.5
n÷3
42899227
n÷3
32174420.25
n÷5
25739536.2
n2
16563093094777761
n3
2.131631671485E+24
n4
2.7433605286627E+32
n5
3.5306413818583E+40
2 √n
11344.500033056
3 √n
504.88241029076
4 √n
106.51056301164
5 √n
41.871078196535
8 divisors
τ
Total Divisors
8
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-128697680
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.125
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
8
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 128697681 can be divided by 8 positive divisors.
The sum of these divisors (counting 128697681) is 1, the average is 0.125.
Base
System
Value
2
Binary
111101010111100010101010001
3
Ternary
22222011112000210
4
Quaternary
13222330111101
5
Quinary
230421311211
6
Senary
20434234333
8
Octal
752742521
10
Decimal
128697681
12
Duodecimal
371259a9
16
Hexadecimal
7abc551
20
Vigesimal
2047441
36
Base36
24mfrl
md5
372b1858a753373b3077f2a4895c3af8
sha1
1fc835bda9789b00343712511e3e8015bfd0e903
sha256
a148641e1bbe67dbfb239259509b22e1f75f8f7c79ec8102a16ae9601256deb0
sha512
29700ca4bfd9cf150a787b6637804af096f458ca63ede82ddd117ec1c4fae20c9c092b15b629f0cac5ab4d38c59265a6d1134f7240cc8e078f7018ba976da2a4
ripemd-160
0bd9e568c9f3aee50e0cb59d5db2e3c9b21cae6e
Diameter
257395362
Circumference
808631378.32729
Area
5.2034491587278E+16
Volume
8.9289578657289E+24
Surface area
2.0813796634911E+17
Circumference
808631378.32729
Perimeter
514790724
Area
16563093094777761
Diagonal
182006005.91617
Surface area
99378558568666566
Volume
2.131631671485E+24
Space diagonal
222910922.30829
Perimeter
386093043
Area
7.1720296926621E+15
Altitude
111455461.15415
Surface area
7.1720296926621E+15
Volume
2.5121520164984E+23
Height
60668668.638722