638993821 is an odd 9-digits prime number following 638993820
and preceding 638993822 . In scientific notation, it is written as 6.38993821 × 10^8.
The sum of its digits is 49. It has a total of 1 prime factors and 2 positive divisors.
There are 638993820 positive integers (up to 638993821) that are relatively prime to 638993821.
638993821 has 2 divisors, whose sum is 638993822
The reverse of 638993821 is 128399836
Previous prime number is 1
Is Prime? yes Number parity odd Number length 9 Sum of Digits 49 Digital Root 4
Name
six hundred thirty-eight million nine hundred ninety-three thousand eight hundred twenty-one
Scientific notation
6.38993821 × 10^8
Engineering notation
6.38993821 × 10^6
Prime Factorization
638993821
Composite number
ω Distinct Factors
1 Total number of distinct prime factors
Ω Total Factors
1 Total number of prime factors
rad Radical
638993821 Product of the distinct prime numbers
The prime factorization of 638993821 is 638993821.
Since it has a total of 1 prime factors.
1 , 3 , 25 , 59 , 717 , 744 , 9823 , 7670 , 65378 , 21083 , 30507 , 131396 , 2483034 , 2734296 , 15173823 , 77483859 , 234566520 , 764472728 , 4328055131 , 1574241101
n×2
1277987642
n×3
1916981463
n×4
2555975284
n×5
3194969105
n÷2
319496910.5
n÷3
212997940.33333
n÷3
159748455.25
n÷5
127798764.2
n2
408313103276180041
n3
2.6090955002681E+26
n4
1.6671959030702E+35
n5
1.0653278804584E+44
2 √n25278.327100503
3 √n861.32202519058
4 √n158.99159443349
5 √n57.689839635344
2 divisors
τ Total Divisors
2 Total number of the positive divisors of n
σ Sum of Divisors
638993822 Sum of all the positive divisors of n
s Aliquot Sum
1 Sum of the proper positive divisors of n
A Arithmetic Mean
319496911 Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G Geometric Mean
25278.327120282 Returns the nth root of the product of n divisors
H Harmonic Mean
1.9999999968701 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 638993821 can be divided by 2 positive divisors.
The sum of these divisors (counting 638993821) is 638993822, the average is 319496911.
Base
System
Value
2
Binary
100110000101100100010110011101
3
Ternary
1122112101020201211
4
Quaternary
212011210112131
5
Quinary
2302040300241
6
Senary
143223504421
8
Octal
4605442635
10
Decimal
638993821
12
Duodecimal
159bb8111
16
Hexadecimal
2616459d
20
Vigesimal
9jde4b1
36
Base36
akfusd
md5
1a6cc51a2f4a1f57dcb8170a6b1baf48
sha1
973f828784e4795abec45131b04bf8d105a9554a
sha256
ee464f7e2679d3a4621575deff0836549f1c57976a9d41b8853a38dfaefc9a4d
sha512
9bb677d2cd5dd29d6f90264f2a3064edad7c5f880ca3795c1f8a817db0ef17b64aa3cfe08eaf3f82181b2294fb073c23ba760815343e8dedc997212246a93e39
ripemd-160
ac1c71f840c3a0c7616368a1a2c5dd001c4133b0
Diameter
1277987642
Circumference
4014916587.4857
Area
1.2827534456169E+18
Volume
1.0928953674875E+27
Surface area
5.1310137824676E+18
Circumference
4014916587.4857
Perimeter
2555975284
Area
408313103276180041
Diagonal
903673727.93081
Surface area
2449878619657080246
Volume
2.6090955002681E+26
Space diagonal
1106769763.6946
Perimeter
1916981463
Area
1.7680476006762E+17
Altitude
553384881.84729
Surface area
1.7680476006762E+17
Volume
3.0748485350048E+25
Height
301224575.97694