28931921 is an odd 8-digits prime number following 28931920
and preceding 28931922 . In scientific notation, it is written as 2.8931921 × 10^7.
The sum of its digits is 35. It has a total of 1 prime factors and 2 positive divisors.
There are 28931920 positive integers (up to 28931921) that are relatively prime to 28931921.
28931921 has 2 divisors, whose sum is 28931922
The reverse of 28931921 is 12913982
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 nine hundred twenty-one
Scientific notation
2.8931921 × 10^7
Engineering notation
2.8931921 × 10^6
Prime Factorization
28931921
Composite number
ω Distinct Factors
1 Total number of distinct prime factors
Ω Total Factors
1 Total number of prime factors
rad Radical
28931921 Product of the distinct prime numbers
The prime factorization of 28931921 is 28931921.
Since it has a total of 1 prime factors.
2 , 6 , 14 , 96 , 905 , 763 , 6836 , 3022 , 60976 , 31594 , 437940 , 647316 , 6948476 , 2405246 , 76968638 , 36032436 , 629881729 , 110011733 , 9474416081 , 6139193572
n×2
57863842
n×3
86795763
n×4
115727684
n×5
144659605
n÷2
14465960.5
n÷3
9643973.6666667
n÷3
7232980.25
n÷5
5786384.2
n2
837056052750241
n3
2.4217639590742E+22
n4
7.0066283544581E+29
n5
2.0271521802754E+37
2 √n5378.8401166051
3 √n306.99108010597
4 √n73.340576194935
5 √n31.065292999185
2 divisors
τ Total Divisors
2 Total number of the positive divisors of n
σ Sum of Divisors
28931922 Sum of all the positive divisors of n
s Aliquot Sum
1 Sum of the proper positive divisors of n
A Arithmetic Mean
14465961 Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G Geometric Mean
5378.8402095619 Returns the nth root of the product of n divisors
H Harmonic Mean
1.9999999308722 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 28931921 can be divided by 2 positive divisors.
The sum of these divisors (counting 28931921) is 28931922, the average is 14465961.
Base
System
Value
2
Binary
1101110010111011101010001
3
Ternary
2000102220010122
4
Quaternary
1232113131101
5
Quinary
24401310141
6
Senary
2512040025
8
Octal
156273521
10
Decimal
28931921
12
Duodecimal
9833015
16
Hexadecimal
1b97751
20
Vigesimal
90g9g1
36
Base36
h840h
md5
e9e33c22b008ca9e06fa3a99be5a7c5f
sha1
a95c10c799b4dd2f2d9365f527ee3a71ad219d93
sha256
c7abb5de68faba583a2943b7d593e7bd6238f8d3d484f04a925b03a6f3633677
sha512
f1007de4fa5df541d5d1ee8a2d0d683feb0274c9c714a8863bc8bb66c9d403d584dd9947e11e88ed9337b5d1187572b1cd50c18269838762f4050349721b4e95
ripemd-160
f49376647be85ca62bc096baeb767215986645b4
Diameter
57863842
Circumference
181784620.93568
Area
2.629689145963E+15
Volume
1.0144261150075E+23
Surface area
1.0518756583852E+16
Circumference
181784620.93568
Perimeter
115727684
Area
837056052750241
Diagonal
40915915.063707
Surface area
5022336316501446
Volume
2.4217639590742E+22
Space diagonal
50111557.132569
Perimeter
86795763
Area
3.6245590303662E+14
Altitude
25055778.566284
Surface area
3.6245590303662E+14
Volume
2.8540761964909E+21
Height
13638638.354569