81087788 (number)

81087788 is an even 8-digits composite number following 81087787 and preceding 81087789. In scientific notation, it is written as 8.1087788 × 10^7. The sum of its digits is 47. It has a total of 5 prime factors and 24 positive divisors. There are 38142720 positive integers (up to 81087788) that are relatively prime to 81087788.

Interesting facts

Basic properties

Name

Name eighty-one million eighty-seven thousand seven hundred eighty-eight

Notation

Scientific notation 8.1087788 × 10^7
Engineering notation 8.1087788 × 10^6

Prime Factorization of 81087788

Prime Factorization 2 × 2 × 23 × 61 × 14449

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 40543894
Product of the distinct prime numbers

The prime factorization of 81087788 is 2 × 2 × 23 × 61 × 14449. Since it has a total of 5 prime factors.

Most popular turbo-numbers

9, 4, 82, 22, 574, 584, 5333, 1835, 74862, 6231, 202784, 591461, 9405877, 2076482, 49023594, 63760432, 300633359, 27627300, 4067480190, 5241005385

Basic calculations (n = 81087788)

Multiplication

n×y
n×2 162175576
n×3 243263364
n×4 324351152
n×5 405438940

Division

n÷y
n÷2 40543894
n÷3 27029262.666667
n÷3 20271947
n÷5 16217557.6

Exponentiation

ny
n2 6575229362732944
n3 5.3317080461666E+23
n4 4.3233641172545E+31
n5 3.5057203298674E+39

Nth Root

y√n
2√n 9004.8757903705
3√n 432.83112602053
4√n 94.894023997144
5√n 38.176058780689

Divisors of 81087788

1, 2, 4, 23, 46, 61, 92, 122, 244, 1403, 2806, 5612, 14449, 28898, 57796, 332327, 664654, 881389, 1329308, 1762778, 3525556, 20271947, 40543894, 81087788

24 divisors

τ Total Divisors 24
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81087787
Sum of the proper positive divisors of n
A Arithmetic Mean 0.041666666666667
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 24
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81087788 can be divided by 24 positive divisors. The sum of these divisors (counting 81087788) is 1, the average is 0.041666666666667.

Base conversion 81087788

Base System Value
2 Binary 100110101010100110100101100
3 Ternary 12122120200112102
4 Quaternary 10311110310230
5 Quinary 131224302123
6 Senary 12013554232
8 Octal 465246454
10 Decimal 81087788
12 Duodecimal 231a5978
16 Hexadecimal 4d54d2c
20 Vigesimal 156fj98
36 Base36 1c9zqk

Cryptographic Hash Functions

md5 0663ce0270c45b9de6ac78b0de5bd25e
sha1 ec423b05ee9350152b30d479fe09c6e08fbe4289
sha256 45783d5054f3b3d33a2c8d2dbf651a886bd4d10c0e8d873619fff01b1163f504
sha512 b732d146191517cf56013fd38ada0e4715494b831fba1967a8fb4f8997730a4c2d3cdf0c6254914ca0577a6d30bb047dcc68915a405724d638729860e0f0678f
ripemd-160 69d8ac09092da9429180a7a21504226f8b81eaa6

81087788 as geometric shapes

Circle

Radius = n
Diameter 162175576
Circumference 509489598.15329
Area 2.065669226163E+16

Sphere

Radius = n
Volume 2.2333406438564E+24
Surface area 8.2626769046519E+16
Circumference 509489598.15329

Square

Length = n
Perimeter 324351152
Area 6575229362732944
Diagonal 114675449.53243

Cube

Length = n
Surface area 39451376176397664
Volume 5.3317080461666E+23
Space diagonal 140448168.68937

Equilateral Triangle

Length = n
Perimeter 243263364
Area 2.847157831918E+15
Altitude 70224084.344687

Triangular Pyramid

Length = n
Surface area 2.847157831918E+15
Volume 6.2834781912522E+22
Height 38225149.844145