28993987 is an odd 8-digits composite number following 28993986
and preceding 28993988 . In scientific notation, it is written as 2.8993987 × 10^7.
The sum of its digits is 55. It has a total of 3 prime factors and 8 positive divisors.
There are 26246400 positive integers (up to 28993987) that are relatively prime to 28993987.
28993987 has 8 divisors, whose sum is 31763952
The reverse of 28993987 is 78939982
Previous prime number is 241
Is Prime? no
Number parity odd
Number length 8
Sum of Digits 55
Digital Root 1
Name
twenty-eight million nine hundred ninety-three thousand nine hundred eighty-seven
Scientific notation
2.8993987 × 10^7
Engineering notation
2.8993987 × 10^6
Prime Factorization
11 × 241 × 10937
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
28993987
Product of the distinct prime numbers
The prime factorization of 28993987 is 11 × 241 × 10937.
Since it has a total of 3 prime factors.
2 , 8 , 13 , 90 , 185 , 248 , 6481 , 8971 , 81799 , 38021 , 633719 , 416430 , 9007905 , 3229069 , 68930054 , 73068614 , 952400520 , 77416019 , 1208738435 , 7436060351
n×2
57987974
n×3
86981961
n×4
115975948
n×5
144969935
n÷2
14496993.5
n÷3
9664662.3333333
n÷3
7248496.75
n÷5
5798797.4
n2
840651282156169
n3
2.4373832346369E+22
n4
7.0669457819081E+29
n5
2.0489893413035E+37
2 √n
5384.6064851575
3 √n
307.21044680072
4 √n
73.379877930925
5 √n
31.078610096973
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
-28993986
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 28993987 can be divided by 8 positive divisors.
The sum of these divisors (counting 28993987) is 1, the average is 0.125.
Base
System
Value
2
Binary
1101110100110100111000011
3
Ternary
2000120001021101
4
Quaternary
1232212213003
5
Quinary
24410301422
6
Senary
2513235231
8
Octal
156464703
10
Decimal
28993987
12
Duodecimal
9862b17
16
Hexadecimal
1ba69c3
20
Vigesimal
9144j7
36
Base36
h9fwj
md5
4d18900c2e8a6ac72f862566726fb904
sha1
3e60b03674e6e2a8205e614fc12fe92c0e419c75
sha256
cad2f1f1b9c392e8e8eb9dbf8e5ba9cad2b7f05547804a2deccc73a7d856f074
sha512
56a75a50d283c87d84115855195498dc24d971a593ca06461ee595c8cb80bba859fe08217c6634c57760ed83fab0f49ec14e54c9fb90f13a6f54e4e1457fbc5b
ripemd-160
56b01947609383dfb105d7f3702547c4f091025d
Diameter
57987974
Circumference
182174593.11496
Area
2.6409838922527E+15
Volume
1.0209687018558E+23
Surface area
1.0563935569011E+16
Circumference
182174593.11496
Perimeter
115975948
Area
840651282156169
Diagonal
41003689.642669
Surface area
5043907692937014
Volume
2.4373832346369E+22
Space diagonal
50219058.597992
Perimeter
86981961
Area
3.640126830356E+14
Altitude
25109529.298996
Surface area
3.640126830356E+14
Volume
2.8724836892703E+21
Height
13667896.547556