28931487 is an odd 8-digits composite number following 28931486
and preceding 28931488 . In scientific notation, it is written as 2.8931487 × 10^7.
The sum of its digits is 42. It has a total of 3 prime factors and 8 positive divisors.
There are 17803968 positive integers (up to 28931487) that are relatively prime to 28931487.
28931487 has 8 divisors, whose sum is 41542704
The reverse of 28931487 is 78413982
Previous prime number is 13
Is Prime? no
Number parity odd
Number length 8
Sum of Digits 42
Digital Root 6
Name
twenty-eight million nine hundred thirty-one thousand four hundred eighty-seven
Scientific notation
2.8931487 × 10^7
Engineering notation
2.8931487 × 10^6
Prime Factorization
3 × 13 × 741833
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
28931487
Product of the distinct prime numbers
The prime factorization of 28931487 is 3 × 13 × 741833.
Since it has a total of 3 prime factors.
6 , 6 , 88 , 51 , 743 , 398 , 7200 , 1697 , 82508 , 13864 , 973931 , 78166 , 6690917 , 8032821 , 28391257 , 62030513 , 860759752 , 360787891 , 7826195345 , 4673981689
n×2
57862974
n×3
86794461
n×4
115725948
n×5
144657435
n÷2
14465743.5
n÷3
9643829
n÷3
7232871.75
n÷5
5786297.4
n2
837030940031169
n3
2.421654976011E+22
n4
7.0062079456946E+29
n5
2.0270001410016E+37
2 √n
5378.7997731836
3 √n
306.98954506796
4 √n
73.340301152801
5 √n
31.065199798197
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
-28931486
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 28931487 can be divided by 8 positive divisors.
The sum of these divisors (counting 28931487) is 1, the average is 0.125.
Base
System
Value
2
Binary
1101110010111010110011111
3
Ternary
2000102212112120
4
Quaternary
1232113112133
5
Quinary
24401301422
6
Senary
2512034023
8
Octal
156272637
10
Decimal
28931487
12
Duodecimal
9832913
16
Hexadecimal
1b9759f
20
Vigesimal
90g8e7
36
Base36
h83of
md5
2423b72896e23ab786c06abd65392ab4
sha1
326ac2fdef386ad1149b826c9967bbae09a9fcf1
sha256
c70c252aaa642c8e75c9b8fc40f0b1512035e9830fc1870fef49ca5173c8c2a8
sha512
815b2786a490d90312827450183f80edd65f8a53120c920ce2088aefa8cdd20b1d253ac8c48332889565fea3a30a7e692f806c0fbdc6bdffb699a4ee8e71679d
ripemd-160
702448159d70cd46dd9600c10e030232327ef8a0
Diameter
57862974
Circumference
181781894.03326
Area
2.6296102520293E+15
Volume
1.0143804642887E+23
Surface area
1.0518441008117E+16
Circumference
181781894.03326
Perimeter
115725948
Area
837030940031169
Diagonal
40915301.295021
Surface area
5022185640187014
Volume
2.421654976011E+22
Space diagonal
50110805.422518
Perimeter
86794461
Area
3.6244502891028E+14
Altitude
25055402.711259
Surface area
3.6244502891028E+14
Volume
2.8539477587192E+21
Height
13638433.765007