81997788 (number)

81997788 is an even 8-digits composite number following 81997787 and preceding 81997789. In scientific notation, it is written as 8.1997788 × 10^7. The sum of its digits is 57. It has a total of 5 prime factors and 24 positive divisors. There are 27132544 positive integers (up to 81997788) that are relatively prime to 81997788.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 8.1997788 × 10^7
Engineering notation 8.1997788 × 10^6

Prime Factorization of 81997788

Prime Factorization 2 × 2 × 3 × 137 × 49877

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 40998894
Product of the distinct prime numbers

The prime factorization of 81997788 is 2 × 2 × 3 × 137 × 49877. Since it has a total of 5 prime factors.

Most popular turbo-numbers

4, 8, 6, 51, 724, 543, 3835, 6211, 49204, 86075, 167756, 706620, 1126644, 642563, 63770789, 83550155, 752351448, 270948378, 6314712128, 3909001306

Basic calculations (n = 81997788)

Multiplication

n×y
n×2 163995576
n×3 245993364
n×4 327991152
n×5 409988940

Division

n÷y
n÷2 40998894
n÷3 27332596
n÷3 20499447
n÷5 16399557.6

Exponentiation

ny
n2 6723637236892944
n3 5.5132338073965E+23
n4 4.5207297693333E+31
n5 3.7068984123108E+39

Nth Root

y√n
2√n 9055.2630000459
3√n 434.4442420405
4√n 95.159145645838
5√n 38.261362150603

Divisors of 81997788

1, 2, 3, 4, 6, 12, 137, 274, 411, 548, 822, 1644, 49877, 99754, 149631, 199508, 299262, 598524, 6833149, 13666298, 20499447, 27332596, 40998894, 81997788

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 -81997787
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 81997788 can be divided by 24 positive divisors. The sum of these divisors (counting 81997788) is 1, the average is 0.041666666666667.

Base conversion 81997788

Base System Value
2 Binary 100111000110010111111011100
3 Ternary 12201021220211010
4 Quaternary 10320302333130
5 Quinary 131442412123
6 Senary 12045255220
8 Octal 470627734
10 Decimal 81997788
12 Duodecimal 23564510
16 Hexadecimal 4e32fdc
20 Vigesimal 15c9e98
36 Base36 1cthwc

Cryptographic Hash Functions

md5 ef7958440d819036a25712c8e9f403f7
sha1 5bc40c3fbe8ed9d59881a9d24bb4446b021266fc
sha256 3e955b0d33cd82f524a38cde9450ff845d7a899c4e45cd4ee1ba0d807e80d970
sha512 fae2ca2e9106b72bb04562c49317fd3deaa28c9bdee7cdc84c255bc898b89cc9d915d450deda57df439731a9933b4663634441e56bfada1a02e380e9c852ca0a
ripemd-160 1468938a2075d613d9d195461063c91421624245

81997788 as geometric shapes

Circle

Radius = n
Diameter 163995576
Circumference 515207296.78283
Area 2.1122929348826E+16

Sphere

Radius = n
Volume 2.309377976912E+24
Surface area 8.4491717395303E+16
Circumference 515207296.78283

Square

Length = n
Perimeter 327991152
Area 6723637236892944
Diagonal 115962383.87419

Cube

Length = n
Surface area 40341823421357664
Volume 5.5132338073965E+23
Space diagonal 142024334.92426

Equilateral Triangle

Length = n
Perimeter 245993364
Area 2.9114203264901E+15
Altitude 71012167.462131

Triangular Pyramid

Length = n
Surface area 2.9114203264901E+15
Volume 6.4974083524617E+22
Height 38654127.958065