81369938 (number)

81369938 is an even 8-digits composite number following 81369937 and preceding 81369939. In scientific notation, it is written as 8.1369938 × 10^7. The sum of its digits is 47. It has a total of 3 prime factors and 8 positive divisors. There are 37555344 positive integers (up to 81369938) that are relatively prime to 81369938.

Interesting facts

Basic properties

Name

Name eighty-one million three hundred sixty-nine thousand nine hundred thirty-eight

Notation

Scientific notation 8.1369938 × 10^7
Engineering notation 8.1369938 × 10^6

Prime Factorization of 81369938

Prime Factorization 2 × 13 × 3129613

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 3
Total number of prime factors
rad Radical 81369938
Product of the distinct prime numbers

The prime factorization of 81369938 is 2 × 13 × 3129613. Since it has a total of 3 prime factors.

Most popular turbo-numbers

1, 7, 33, 82, 818, 461, 6572, 4147, 54887, 19398, 281301, 400368, 4687922, 8022555, 58516288, 89422999, 595968682, 285292675, 7895773512, 3923829334

Basic calculations (n = 81369938)

Multiplication

n×y
n×2 162739876
n×3 244109814
n×4 325479752
n×5 406849690

Division

n÷y
n÷2 40684969
n÷3 27123312.666667
n÷3 20342484.5
n÷5 16273987.6

Exponentiation

ny
n2 6621066810123844
n3 5.3875579583363E+23
n4 4.3838525704124E+31
n5 3.5671381185559E+39

Nth Root

y√n
2√n 9020.5286984744
3√n 433.33256581061
4√n 94.976463918565
5√n 38.202589074845

Divisors of 81369938

1, 2, 13, 26, 3129613, 6259226, 40684969, 81369938

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 -81369937
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 81369938 can be divided by 8 positive divisors. The sum of these divisors (counting 81369938) is 1, the average is 0.125.

Base conversion 81369938

Base System Value
2 Binary 100110110011001101101010010
3 Ternary 12200010000120102
4 Quaternary 10312121231102
5 Quinary 131312314223
6 Senary 12024012402
8 Octal 466315522
10 Decimal 81369938
12 Duodecimal 23301102
16 Hexadecimal 4d99b52
20 Vigesimal 158b4gi
36 Base36 1cg1g2

Cryptographic Hash Functions

md5 170a49a4c96144776afd607a8b5c9271
sha1 3f7a42178d8e157ee56e7a3b6dcea17041d863d1
sha256 820dd079b7a9e4bf8fd99788a3f04dabd1657547cb0a57d32993a8b8e9159e0c
sha512 30d7f194a39392e740a574d2ec4c3c9681613061580c1d674c8eee196b8f2dece1c0d2256342c4d20353f616035da3698506cf21ad1a2cf3ddd7ef5cdb01ce6e
ripemd-160 5a68eb9bb984f17c0b93f8a5da8c500ece50eeca

81369938 as geometric shapes

Circle

Radius = n
Diameter 162739876
Circumference 511262398.88771
Area 2.0800694849612E+16

Sphere

Radius = n
Volume 2.2567350003598E+24
Surface area 8.3202779398449E+16
Circumference 511262398.88771

Square

Length = n
Perimeter 325479752
Area 6621066810123844
Diagonal 115074469.88906

Cube

Length = n
Surface area 39726400860743064
Volume 5.3875579583363E+23
Space diagonal 140936866.82473

Equilateral Triangle

Length = n
Perimeter 244109814
Area 2.8670060288606E+15
Altitude 70468433.412365

Triangular Pyramid

Length = n
Surface area 2.8670060288606E+15
Volume 6.3492979439586E+22
Height 38358156.629686