81390930 (number)

81390930 is an even 8-digits composite number following 81390929 and preceding 81390931. In scientific notation, it is written as 8.1390930 × 10^7. The sum of its digits is 33. It has a total of 5 prime factors and 32 positive divisors. There are 21379776 positive integers (up to 81390930) that are relatively prime to 81390930.

Interesting facts

Basic properties

Name

Name eighty-one million three hundred ninety thousand nine hundred thirty

Notation

Scientific notation 8.1390930 × 10^7
Engineering notation 8.1390930 × 10^6

Prime Factorization of 81390930

Prime Factorization 2 × 3 × 5 × 67 × 40493

Composite number
ω Distinct Factors 5
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 81390930
Product of the distinct prime numbers

The prime factorization of 81390930 is 2 × 3 × 5 × 67 × 40493. Since it has a total of 5 prime factors.

Most popular turbo-numbers

8, 8, 37, 63, 983, 871, 3892, 1420, 30827, 38361, 514388, 813494, 5861259, 5412469, 11287538, 61465659, 641902474, 562152646, 3624504546, 8452290354

Basic calculations (n = 81390930)

Multiplication

n×y
n×2 162781860
n×3 244172790
n×4 325563720
n×5 406954650

Division

n÷y
n÷2 40695465
n÷3 27130310
n÷3 20347732.5
n÷5 16278186

Exponentiation

ny
n2 6624483486264900
n3 5.3917287171674E+23
n4 4.3883781459796E+31
n5 3.5717417849296E+39

Nth Root

y√n
2√n 9021.6921916013
3√n 433.36982664391
4√n 94.982588886602
5√n 38.204559989478

Divisors of 81390930

1, 2, 3, 5, 6, 10, 15, 30, 67, 134, 201, 335, 402, 670, 1005, 2010, 40493, 80986, 121479, 202465, 242958, 404930, 607395, 1214790, 2713031, 5426062, 8139093, 13565155, 16278186, 27130310, 40695465, 81390930

32 divisors

τ Total Divisors 32
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81390929
Sum of the proper positive divisors of n
A Arithmetic Mean 0.03125
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 32
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81390930 can be divided by 32 positive divisors. The sum of these divisors (counting 81390930) is 1, the average is 0.03125.

Base conversion 81390930

Base System Value
2 Binary 100110110011110110101010010
3 Ternary 12200011002100220
4 Quaternary 10312132311102
5 Quinary 131314002210
6 Senary 12024253510
8 Octal 466366522
10 Decimal 81390930
12 Duodecimal 23311296
16 Hexadecimal 4d9ed52
20 Vigesimal 158dh6a
36 Base36 1cghn6

Cryptographic Hash Functions

md5 6a21b9bebf6878c4883fa67a6739efb0
sha1 aa2d94dfdcaf4a15288077abd9c926e2433b3504
sha256 55e38eb96d16df72e1cd65b9f472f7a436dd2dde9cafdcf60d678e1aaf9ffb62
sha512 1566f4783f909f288939c24e7c269057ba779543050dc9c09dd92580f0a98bca14147035f45572229b3cc49921f110b8254689582e2f2c4ce913c28359a8931c
ripemd-160 f19b1bc365e7e01f4320580bf69a9e3fed480fe0

81390930 as geometric shapes

Circle

Radius = n
Diameter 162781860
Circumference 511394295.51368
Area 2.0811428654277E+16

Sphere

Radius = n
Volume 2.2584820437336E+24
Surface area 8.3245714617107E+16
Circumference 511394295.51368

Square

Length = n
Perimeter 325563720
Area 6624483486264900
Diagonal 115104157.06016

Cube

Length = n
Surface area 39746900917589400
Volume 5.3917287171674E+23
Space diagonal 140973226.03528

Equilateral Triangle

Length = n
Perimeter 244172790
Area 2.868485493028E+15
Altitude 70486613.017641

Triangular Pyramid

Length = n
Surface area 2.868485493028E+15
Volume 6.3542132303789E+22
Height 38368052.353386