28742487 is an odd 8-digits composite number following 28742486
and preceding 28742488 . In scientific notation, it is written as 2.8742487 × 10^7.
The sum of its digits is 42. It has a total of 3 prime factors and 8 positive divisors.
There are 18543480 positive integers (up to 28742487) that are relatively prime to 28742487.
28742487 has 8 divisors, whose sum is 39559680
The reverse of 28742487 is 78424782
Previous prime number is 31
Is Prime? no
Number parity odd
Number length 8
Sum of Digits 42
Digital Root 6
Name
twenty-eight million seven hundred forty-two thousand four hundred eighty-seven
Scientific notation
2.8742487 × 10^7
Engineering notation
2.8742487 × 10^6
Prime Factorization
3 × 31 × 309059
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
28742487
Product of the distinct prime numbers
The prime factorization of 28742487 is 3 × 31 × 309059.
Since it has a total of 3 prime factors.
3 , 9 , 26 , 57 , 157 , 595 , 4486 , 7400 , 40488 , 55903 , 370739 , 847498 , 2398837 , 5995715 , 87292045 , 69251613 , 213555331 , 176950198 , 9861458747 , 5135795766
n×2
57484974
n×3
86227461
n×4
114969948
n×5
143712435
n÷2
14371243.5
n÷3
9580829
n÷3
7185621.75
n÷5
5748497.4
n2
826130558945169
n3
2.3745046850784E+22
n4
6.8249170042306E+29
n5
1.9616508827018E+37
2 √n
5361.2020107435
3 √n
306.31959645541
4 √n
73.220229518511
5 √n
31.02450555147
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
-28742486
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 28742487 can be divided by 8 positive divisors.
The sum of these divisors (counting 28742487) is 1, the average is 0.125.
Base
System
Value
2
Binary
1101101101001001101010111
3
Ternary
2000002021021120
4
Quaternary
1231221031113
5
Quinary
24324224422
6
Senary
2504015023
8
Octal
155511527
10
Decimal
28742487
12
Duodecimal
9761473
16
Hexadecimal
1b69357
20
Vigesimal
8jcg47
36
Base36
h41uf
md5
01db4d4ca03b0a22487f06e5056ae64a
sha1
32c296ad4fe44227bb3e3a35865afc892101193f
sha256
2d6a8680cac2729b29f3cbcdacb80748a4e7e28fcbbfbd5c00d86a1400c51d46
sha512
10212227b18097b7f3e5751270488985c21c015380a3aa1f43a378067baed3f3d2fb1ee4adbbfd81c86c9420c90657cae982d729a61ff883e1076764b32a0e7e
ripemd-160
987e31682cf452d314855aad56eab6ff8bf8e410
Diameter
57484974
Circumference
180594372.0102
Area
2.5953656948882E+15
Volume
9.9463019660759E+22
Surface area
1.0381462779553E+16
Circumference
180594372.0102
Perimeter
114969948
Area
826130558945169
Diagonal
40648014.931732
Surface area
4956783353671014
Volume
2.3745046850784E+22
Space diagonal
49783447.819888
Perimeter
86227461
Area
3.5772502544458E+14
Altitude
24891723.909944
Surface area
3.5772502544458E+14
Volume
2.7983806079636E+21
Height
13549338.310577