1991239906 is an even 10-digits composite number following 1991239905
and preceding 1991239907 . In scientific notation, it is written as 1.991239906 × 10^9.
The sum of its digits is 49. It has a total of 4 prime factors and 16 positive divisors.
There are 990808560 positive integers (up to 1991239906) that are relatively prime to 1991239906.
1991239906 has 16 divisors, whose sum is 3001331520
The reverse of 1991239906 is 6099321991
Previous prime number is 439
Is Prime? no
Number parity even
Number length 10
Sum of Digits 49
Digital Root 4
Name
one billion nine hundred ninety-one million two hundred thirty-nine thousand nine hundred six
Scientific notation
1.991239906 × 10^9
Engineering notation
1.991239906 × 10^9
Prime Factorization
2 × 421 × 439 × 5387
Composite number
ω
Distinct Factors
4
Total number of distinct prime factors
Ω
Total Factors
4
Total number of prime factors
rad
Radical
1991239906
Product of the distinct prime numbers
The prime factorization of 1991239906 is 2 × 421 × 439 × 5387.
Since it has a total of 4 prime factors.
2 , 10 , 70 , 37 , 380 , 454 , 4681 , 7512 , 83932 , 77486 , 705873 , 934155 , 1171359 , 9016952 , 50092441 , 83346316 , 56340823 , 548731018 , 7972732366 , 3459420090
n×2
3982479812
n×3
5973719718
n×4
7964959624
n×5
9956199530
n÷2
995619953
n÷3
663746635.33333
n÷3
497809976.5
n÷5
398247981.2
n2
3965036363246888836
n3
7.8953386352383E+27
n4
1.572151336187E+37
n5
3.1305304788868E+46
2 √n
44623.311239754
3 √n
1258.0788531635
4 √n
211.24230456931
5 √n
72.414363456611
1 , 2 , 421 , 439 , 842 , 878 , 5387 , 10774 , 184819 , 369638 , 2267927 , 2364893 , 4535854 , 4729786 , 995619953 , 1991239906
16 divisors
τ
Total Divisors
16
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-1991239905
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.0625
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
16
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 1991239906 can be divided by 16 positive divisors.
The sum of these divisors (counting 1991239906) is 1, the average is 0.0625.
Base
System
Value
2
Binary
1110110101011111110100011100010
3
Ternary
12010202212110122011
4
Quaternary
1312223332203202
5
Quinary
13034224134111
6
Senary
525331103134
8
Octal
16653764342
10
Decimal
1991239906
12
Duodecimal
476a41aaa
16
Hexadecimal
76afe8e2
20
Vigesimal
1b254jf6
36
Base36
wxj6jm
md5
a052a43c32065a39fcb111a710f8705d
sha1
9dae6ac7c8f07c1f2fa26db19205a8a95f3725aa
sha256
b93e4d33bb2ccf8ce45e9fba389a33eb77c37f33de93a923e3b4a4eec0dc8ae6
sha512
e272cebf9c35dee22f9ba3ec2fa0b13533d89b435b622e972fea69e3f77120ad490fb038e9eea01dd9072c171931f37eeca9722053294e9380b51de576b8bec0
ripemd-160
86a1df9ac90b72dc26b3ab9e7aaa782c58598b33
Diameter
3982479812
Circumference
12511329320.449
Area
1.2456529109993E+19
Volume
3.3071917138758E+28
Surface area
4.9826116439971E+19
Circumference
12511329320.449
Perimeter
7964959624
Area
3965036363246888836
Diagonal
2816038481.0037
Surface area
2.3790218179481E+19
Volume
7.8953386352383E+27
Space diagonal
3448928687.2507
Perimeter
5973719718
Area
1.7169111087504E+18
Altitude
1724464343.6253
Surface area
1.7169111087504E+18
Volume
9.3047458145686E+26
Height
938679493.66791