81389968 (number)

81389968 is an even 8-digits composite number following 81389967 and preceding 81389969. In scientific notation, it is written as 8.1389968 × 10^7. The sum of its digits is 52. It has a total of 6 prime factors and 20 positive divisors. There are 36995360 positive integers (up to 81389968) that are relatively prime to 81389968.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 8.1389968 × 10^7
Engineering notation 8.1389968 × 10^6

Prime Factorization of 81389968

Prime Factorization 2 × 2 × 2 × 2 × 11 × 462443

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 6
Total number of prime factors
rad Radical 10173746
Product of the distinct prime numbers

The prime factorization of 81389968 is 2 × 2 × 2 × 2 × 11 × 462443. Since it has a total of 6 prime factors.

Most popular turbo-numbers

3, 1, 3, 97, 317, 764, 4515, 4988, 26239, 73726, 329842, 519849, 2102281, 26706, 85003169, 68856256, 257352270, 345302780, 3861766141, 5456265133

Basic calculations (n = 81389968)

Multiplication

n×y
n×2 162779936
n×3 244169904
n×4 325559872
n×5 406949840

Division

n÷y
n÷2 40694984
n÷3 27129989.333333
n÷3 20347492
n÷5 16277993.6

Exponentiation

ny
n2 6624326891041024
n3 5.3915375368337E+23
n4 4.3881706759369E+31
n5 3.5715307089304E+39

Nth Root

y√n
2√n 9021.6388755037
3√n 433.36811923247
4√n 94.982308223709
5√n 38.204469677301

Divisors of 81389968

1, 2, 4, 8, 11, 16, 22, 44, 88, 176, 462443, 924886, 1849772, 3699544, 5086873, 7399088, 10173746, 20347492, 40694984, 81389968

20 divisors

τ Total Divisors 20
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81389967
Sum of the proper positive divisors of n
A Arithmetic Mean 0.05
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 20
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81389968 can be divided by 20 positive divisors. The sum of these divisors (counting 81389968) is 1, the average is 0.05.

Base conversion 81389968

Base System Value
2 Binary 100110110011110100110010000
3 Ternary 12200011001001021
4 Quaternary 10312132212100
5 Quinary 131313434333
6 Senary 12024245224
8 Octal 466364620
10 Decimal 81389968
12 Duodecimal 23310814
16 Hexadecimal 4d9e990
20 Vigesimal 158dei8
36 Base36 1cggwg

Cryptographic Hash Functions

md5 be9166a1d0692e23bb1aa766d9b6da63
sha1 64d5f8180e2aedc01c1ad67b4be3682f97907c20
sha256 10498551fea3006f015aa1c51f7b382dc0efa689083146c4028b02680318e539
sha512 2ea5bf0bb0d7e5e0c2960a53d2afefe84663a7762f9950c462ccc9f05c64a86bdd61bcb99c2abc3dd05bfc5245205015cbf7f08b0b6e8d5037200c1cdbcae9d0
ripemd-160 02231c61a36de9d69e360fd309dc8e4d31304f83

81389968 as geometric shapes

Circle

Radius = n
Diameter 162779936
Circumference 511388251.08942
Area 2.0810936695872E+16

Sphere

Radius = n
Volume 2.2584019623027E+24
Surface area 8.3243746783487E+16
Circumference 511388251.08942

Square

Length = n
Perimeter 325559872
Area 6624326891041024
Diagonal 115102796.58671

Cube

Length = n
Surface area 39745961346246144
Volume 5.3915375368337E+23
Space diagonal 140971559.80241

Equilateral Triangle

Length = n
Perimeter 244169904
Area 2.868417685307E+15
Altitude 70485779.901203

Triangular Pyramid

Length = n
Surface area 2.868417685307E+15
Volume 6.3539879221949E+22
Height 38367598.862237