128888921 is an odd 9-digits composite number following 128888920
and preceding 128888922 . In scientific notation, it is written as 1.28888921 × 10^8.
The sum of its digits is 47. It has a total of 2 prime factors and 4 positive divisors.
There are 110476212 positive integers (up to 128888921) that are relatively prime to 128888921.
128888921 has 4 divisors, whose sum is 147301632
The reverse of 128888921 is 129888821
Previous prime number is 7
Is Prime? no Number parity odd Number length 9 Sum of Digits 47 Digital Root 2
Name
one hundred twenty-eight million eight hundred eighty-eight thousand nine hundred twenty-one
Scientific notation
1.28888921 × 10^8
Engineering notation
1.28888921 × 10^6
Prime Factorization
7 × 18412703
Composite number
ω Distinct Factors
2 Total number of distinct prime factors
Ω Total Factors
2 Total number of prime factors
rad Radical
128888921 Product of the distinct prime numbers
The prime factorization of 128888921 is 7 × 18412703.
Since it has a total of 2 prime factors.
5 , 9 , 65 , 25 , 944 , 501 , 5544 , 8866 , 56958 , 73896 , 613458 , 532806 , 2060692 , 9995595 , 49234264 , 14401057 , 731696795 , 103807076 , 1436718540 , 5766689220
n×2
257777842
n×3
386666763
n×4
515555684
n×5
644444605
n÷2
64444460.5
n÷3
42962973.666667
n÷3
32222230.25
n÷5
25777784.2
n2
16612353956544241
n3
2.1411483767291E+24
n4
2.7597030397751E+32
n5
3.5569514707703E+40
2 √n11352.925658173
3 √n505.13236539421
4 √n106.55010867274
5 √n41.883514581831
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
-128888920 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 128888921 can be divided by 4 positive divisors.
The sum of these divisors (counting 128888921) is 1, the average is 0.25.
Base
System
Value
2
Binary
111101011101011000001011001
3
Ternary
22222112020100202
4
Quaternary
13223223001121
5
Quinary
230443421141
6
Senary
20442311545
8
Octal
753530131
10
Decimal
128888921
12
Duodecimal
371b85b5
16
Hexadecimal
7aeb059
20
Vigesimal
205b261
36
Base36
24qjbt
md5
a471b79051ca82ce7f3baa6ebf27a811
sha1
1c72e60e0cd3961507aba4c3979d36b1ac14528b
sha256
72cd7b043dbc38002817b06e33324a75968c11ff22ba6d22359def1c86930499
sha512
982694ee39a5faea5234718a303ac2a372d0128d081f83306994bd3103b4242e2e769b07edbe1c6c5ff02100d7c58083833bea87f099820d8ac3c1f5cc30c170
ripemd-160
b986b0293c992e97125551714ff04c9720ec6570
Diameter
257777842
Circumference
809832974.68543
Area
5.2189249148713E+16
Volume
8.968821347437E+24
Surface area
2.0875699659485E+17
Circumference
809832974.68543
Perimeter
515555684
Area
16612353956544241
Diagonal
182276460.11783
Surface area
99674123739265446
Volume
2.1411483767291E+24
Space diagonal
223242159.70473
Perimeter
386666763
Area
7.1933602715131E+15
Altitude
111621079.85237
Surface area
7.1933602715131E+15
Volume
2.5233675611862E+23
Height
60758820.039278