638997989 is an odd 9-digits composite number following 638997988
and preceding 638997990 . In scientific notation, it is written as 6.38997989 × 10^8.
The sum of its digits is 68. It has a total of 3 prime factors and 8 positive divisors.
There are 515494080 positive integers (up to 638997989) that are relatively prime to 638997989.
638997989 has 8 divisors, whose sum is 773241408
The reverse of 638997989 is 989799836
Previous prime number is 17
Is Prime? no
Number parity odd
Number length 9
Sum of Digits 68
Digital Root 5
Name
six hundred thirty-eight million nine hundred ninety-seven thousand nine hundred eighty-nine
Scientific notation
6.38997989 × 10^8
Engineering notation
6.38997989 × 10^6
Prime Factorization
7 × 17 × 5369731
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
638997989
Product of the distinct prime numbers
The prime factorization of 638997989 is 7 × 17 × 5369731.
Since it has a total of 3 prime factors.
7 , 10 , 46 , 47 , 848 , 926 , 6346 , 7431 , 93219 , 34004 , 943150 , 889207 , 9951070 , 5349615 , 77737514 , 47924802 , 162538996 , 173741627 , 5261582013 , 9564891247
n×2
1277995978
n×3
1916993967
n×4
2555991956
n×5
3194989945
n÷2
319498994.5
n÷3
212999329.66667
n÷3
159749497.25
n÷5
127799597.8
n2
408318429946044121
n3
2.6091465560716E+26
n4
1.667239402336E+35
n5
1.0653626252743E+44
2 √n
25278.409542533
3 √n
861.3238979173
4 √n
158.99185369865
5 √n
57.689914894483
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
-638997988
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 638997989 can be divided by 8 positive divisors.
The sum of these divisors (counting 638997989) is 1, the average is 0.125.
Base
System
Value
2
Binary
100110000101100101010111100101
3
Ternary
1122112101110110012
4
Quaternary
212011211113211
5
Quinary
2302040413424
6
Senary
143223540005
8
Octal
4605452745
10
Decimal
638997989
12
Duodecimal
159bba605
16
Hexadecimal
261655e5
20
Vigesimal
9jdeej9
36
Base36
akfy05
md5
517cd1f9f28f7a47b7e19c056f20c74a
sha1
dc7809b1da9a1d1b9b828d3b6427118afaf97e61
sha256
44aac94549767a4f4832b4b16b89732722c457fa6d6e1ff78eb3a34c240045e5
sha512
57818cf933232f5b9622c45c85b3bf22469ad7b3b873ca45b8616cdf38f8ef4ee1c6b77edbeb75782b03cf1acaa1bf220b5888b39459b264f6db18c80db66af7
ripemd-160
69e8cc8682354ea2578493eb44d2fc6cf4fac581
Diameter
1277995978
Circumference
4014942775.8021
Area
1.2827701798438E+18
Volume
1.0929167536925E+27
Surface area
5.1310807193752E+18
Circumference
4014942775.8021
Perimeter
2555991956
Area
408318429946044121
Diagonal
903679622.37293
Surface area
2449910579676264726
Volume
2.6091465560716E+26
Space diagonal
1106776982.8823
Perimeter
1916993967
Area
1.7680706658333E+17
Altitude
553388491.44117
Surface area
1.7680706658333E+17
Volume
3.0749087048463E+25
Height
301226540.79098