28931381 is an odd 8-digits prime number following 28931380
and preceding 28931382 . In scientific notation, it is written as 2.8931381 × 10^7.
The sum of its digits is 35. It has a total of 1 prime factors and 2 positive divisors.
There are 28931380 positive integers (up to 28931381) that are relatively prime to 28931381.
28931381 has 2 divisors, whose sum is 28931382
The reverse of 28931381 is 18313982
Previous prime number is 1
Is Prime? yes Number parity odd Number length 8 Sum of Digits 35 Digital Root 8
Name
twenty-eight million nine hundred thirty-one thousand three hundred eighty-one
Scientific notation
2.8931381 × 10^7
Engineering notation
2.8931381 × 10^6
Prime Factorization
28931381
Composite number
ω Distinct Factors
1 Total number of distinct prime factors
Ω Total Factors
1 Total number of prime factors
rad Radical
28931381 Product of the distinct prime numbers
The prime factorization of 28931381 is 28931381.
Since it has a total of 1 prime factors.
7 , 10 , 44 , 49 , 420 , 771 , 7069 , 9751 , 25693 , 17517 , 994327 , 319693 , 8896894 , 9548827 , 72880796 , 99570292 , 228896299 , 184684025 , 1523940719 , 49180365
n×2
57862762
n×3
86794143
n×4
115725524
n×5
144656905
n÷2
14465690.5
n÷3
9643793.6666667
n÷3
7232845.25
n÷5
5786276.2
n2
837024806567161
n3
2.4216283585246E+22
n4
7.0061052680879E+29
n5
2.0269630083716E+37
2 √n5378.7899196752
3 √n306.98917014851
4 √n73.340233976142
5 √n31.065177034652
2 divisors
τ Total Divisors
2 Total number of the positive divisors of n
σ Sum of Divisors
28931382 Sum of all the positive divisors of n
s Aliquot Sum
1 Sum of the proper positive divisors of n
A Arithmetic Mean
14465691 Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G Geometric Mean
5378.790012633 Returns the nth root of the product of n divisors
H Harmonic Mean
1.9999999308709 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 28931381 can be divided by 2 positive divisors.
The sum of these divisors (counting 28931381) is 28931382, the average is 14465691.
Base
System
Value
2
Binary
1101110010111010100110101
3
Ternary
2000102212101122
4
Quaternary
1232113110311
5
Quinary
24401301011
6
Senary
2512033325
8
Octal
156272465
10
Decimal
28931381
12
Duodecimal
9832845
16
Hexadecimal
1b97535
20
Vigesimal
90g891
36
Base36
h83lh
md5
02ef9e718cc1e544cda1edd961001cc2
sha1
15563a56d17d9f53afb10fc3866e2d13c0b12aa3
sha256
e9107ddac9a19d448a795d05d424b101c7376f4a5b3774ece2f7de816725418f
sha512
c7ce9241c90ac040f801662d32da64ade3b728e56e59a07f9ce21c68105bf3e3bf7e5e057ae6808bd964a65a0161661c030140fe04e38283e62f289c6a64a40f
ripemd-160
47e95128a9fb5fcb3a5f1323afb4f9c666a7caa8
Diameter
57862762
Circumference
181781228.01561
Area
2.6295909831838E+15
Volume
1.0143693147821E+23
Surface area
1.0518363932735E+16
Circumference
181781228.01561
Perimeter
115725524
Area
837024806567161
Diagonal
40915151.388383
Surface area
5022148839402966
Volume
2.4216283585246E+22
Space diagonal
50110621.825133
Perimeter
86794143
Area
3.6244237304246E+14
Altitude
25055310.912566
Surface area
3.6244237304246E+14
Volume
2.8539163897106E+21
Height
13638383.796128