1991239908 is an even 10-digits composite number following 1991239907
and preceding 1991239909 . In scientific notation, it is written as 1.991239908 × 10^9.
The sum of its digits is 51. It has a total of 4 prime factors and 12 positive divisors.
There are 568925664 positive integers (up to 1991239908) that are relatively prime to 1991239908.
1991239908 has 12 divisors, whose sum is 3650606652
The reverse of 1991239908 is 8099321991
Previous prime number is 21
Is Prime? no Number parity even Number length 10 Sum of Digits 51 Digital Root 6
Name
one billion nine hundred ninety-one million two hundred thirty-nine thousand nine hundred eight
Scientific notation
1.991239908 × 10^9
Engineering notation
1.991239908 × 10^9
Prime Factorization
2 × 2 × 21 × 23705237
Composite number
ω Distinct Factors
3 Total number of distinct prime factors
Ω Total Factors
4 Total number of prime factors
rad Radical
995619954 Product of the distinct prime numbers
The prime factorization of 1991239908 is 2 × 2 × 21 × 23705237.
Since it has a total of 4 prime factors.
7 , 1 , 76 , 48 , 682 , 424 , 1149 , 8007 , 48783 , 52322 , 683456 , 193017 , 3420907 , 8059221 , 26667482 , 50038734 , 173968156 , 693069916 , 65767974 , 3984912359
n×2
3982479816
n×3
5973719724
n×4
7964959632
n×5
9956199540
n÷2
995619954
n÷3
663746636
n÷3
497809977
n÷5
398247981.6
n2
3965036371211848464
n3
7.8953386590285E+27
n4
1.5721513425033E+37
n5
3.1305304946083E+46
2 √n44623.311262164
3 √n1258.0788535847
4 √n211.24230462236
5 √n72.414363471158
1 , 2 , 4 , 21 , 42 , 84 , 23705237 , 47410474 , 94820948 , 497809977 , 995619954 , 1991239908
12 divisors
τ Total Divisors
12 Total number of the positive divisors of n
σ Sum of Divisors
1 Sum of all the positive divisors of n
s Aliquot Sum
-1991239907 Sum of the proper positive divisors of n
A Arithmetic Mean
0.083333333333333 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
12 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 1991239908 can be divided by 12 positive divisors.
The sum of these divisors (counting 1991239908) is 1, the average is 0.083333333333333.
Base
System
Value
2
Binary
1110110101011111110100011100100
3
Ternary
12010202212110122020
4
Quaternary
1312223332203210
5
Quinary
13034224134113
6
Senary
525331103140
8
Octal
16653764344
10
Decimal
1991239908
12
Duodecimal
476a41ab0
16
Hexadecimal
76afe8e4
20
Vigesimal
1b254jf8
36
Base36
wxj6jo
md5
9dd0e30a1b72188334eefd470c68871b
sha1
032c932149697b118c54eb906710fc9882bc6397
sha256
b07e867d30af16526c5b2a1623b6d8e6d177e804015fa5e6a6fe7163a98df404
sha512
18ab9ec1e584c1ac7ed28f71a0a3e01c5b63adc59d6f6a21c60542ca754dae07fa7015ce7d7289b5ce91fc2a9d028b4eed735e149c73aa9bac58f974a00b80cc
ripemd-160
2e7cac60290089557f8f753f5f888914c9b8c998
Diameter
3982479816
Circumference
12511329333.015
Area
1.2456529135015E+19
Volume
3.307191723841E+28
Surface area
4.9826116540062E+19
Circumference
12511329333.015
Perimeter
7964959632
Area
3965036371211848464
Diagonal
2816038483.8322
Surface area
2.3790218227271E+19
Volume
7.8953386590285E+27
Space diagonal
3448928690.7148
Perimeter
5973719724
Area
1.7169111121994E+18
Altitude
1724464345.3574
Surface area
1.7169111121994E+18
Volume
9.3047458426056E+26
Height
938679494.61072