81388900 (number)

81388900 is an even 8-digits composite number following 81388899 and preceding 81388901. In scientific notation, it is written as 8.1388900 × 10^7. The sum of its digits is 37. It has a total of 6 prime factors and 36 positive divisors. There are 31674240 positive integers (up to 81388900) that are relatively prime to 81388900.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 8.1388900 × 10^7
Engineering notation 8.1388900 × 10^6

Prime Factorization of 81388900

Prime Factorization 2 × 2 × 5 × 5 × 37 × 21997

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 6
Total number of prime factors
rad Radical 8138890
Product of the distinct prime numbers

The prime factorization of 81388900 is 2 × 2 × 5 × 5 × 37 × 21997. Since it has a total of 6 prime factors.

Most popular turbo-numbers

8, 3, 50, 76, 430, 710, 4229, 7964, 83520, 13253, 153002, 107241, 8821345, 8800824, 18771394, 54733307, 796713696, 118551390, 4444594488, 9448603464

Basic calculations (n = 81388900)

Multiplication

n×y
n×2 162777800
n×3 244166700
n×4 325555600
n×5 406944500

Division

n÷y
n÷2 40694450
n÷3 27129633.333333
n÷3 20347225
n÷5 16277780

Exponentiation

ny
n2 6624153043210000
n3 5.3913252961851E+23
n4 4.3879403539868E+31
n5 3.571296386766E+39

Nth Root

y√n
2√n 9021.5796842903
3√n 433.36622367053
4√n 94.981996632469
5√n 38.204369412885

Divisors of 81388900

1, 2, 4, 5, 10, 20, 25, 37, 50, 74, 100, 148, 185, 370, 740, 925, 1850, 3700, 21997, 43994, 87988, 109985, 219970, 439940, 549925, 813889, 1099850, 1627778, 2199700, 3255556, 4069445, 8138890, 16277780, 20347225, 40694450, 81388900

36 divisors

τ Total Divisors 36
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81388899
Sum of the proper positive divisors of n
A Arithmetic Mean 0.027777777777778
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 36
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81388900 can be divided by 36 positive divisors. The sum of these divisors (counting 81388900) is 1, the average is 0.027777777777778.

Base conversion 81388900

Base System Value
2 Binary 100110110011110010101100100
3 Ternary 12200010222120201
4 Quaternary 10312132111210
5 Quinary 131313421100
6 Senary 12024240244
8 Octal 466362544
10 Decimal 81388900
12 Duodecimal 23310084
16 Hexadecimal 4d9e564
20 Vigesimal 158dc50
36 Base36 1cgg2s

Cryptographic Hash Functions

md5 ef394013c3dcf46800a32af706fa7dc1
sha1 8f3272944d70224f89fbca9582ba865c259fc960
sha256 63360c93fa2747e96a27afaeea65b509ad6e01e6b71962c75f9cda095c71c27e
sha512 8754864fc2ed51f798471cc398f2b2aa87b15c5099aaace2c73de1db6eedeed90101c7142697b496a62647887e183c6bb9412b6d9fa457dd79db9fdc99b99774
ripemd-160 1836a05e43fb53071a718e315e9ab5f736c1ae2f

81388900 as geometric shapes

Circle

Radius = n
Diameter 162777800
Circumference 511381540.64751
Area 2.0810390536803E+16

Sphere

Radius = n
Volume 2.2583130591477E+24
Surface area 8.3241562147212E+16
Circumference 511381540.64751

Square

Length = n
Perimeter 325555600
Area 6624153043210000
Diagonal 115101286.20663

Cube

Length = n
Surface area 39744918259260000
Volume 5.3913252961851E+23
Space diagonal 140969709.97214

Equilateral Triangle

Length = n
Perimeter 244166700
Area 2.8683424069879E+15
Altitude 70484854.986071

Triangular Pyramid

Length = n
Surface area 2.8683424069879E+15
Volume 6.3537377941918E+22
Height 38367095.402209