128538787 (number)

128538787 is an odd 9-digits composite number following 128538786 and preceding 128538788. In scientific notation, it is written as 1.28538787 × 10^8. The sum of its digits is 49. It has a total of 2 prime factors and 4 positive divisors. There are 118651176 positive integers (up to 128538787) that are relatively prime to 128538787.

Interesting facts

Basic properties

Name

Name one hundred twenty-eight million five hundred thirty-eight thousand seven hundred eighty-seven

Notation

Scientific notation 1.28538787 × 10^8
Engineering notation 1.28538787 × 10^6

Prime Factorization of 128538787

Prime Factorization 13 × 9887599

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 128538787
Product of the distinct prime numbers

The prime factorization of 128538787 is 13 × 9887599. Since it has a total of 2 prime factors.

Most popular turbo-numbers

4, 10, 74, 63, 975, 270, 4207, 9324, 30334, 19568, 675507, 222150, 8349646, 1560892, 16445878, 50610561, 251883244, 533848803, 1296050820, 5460493217

Basic calculations (n = 128538787)

Multiplication

n×y
n×2 257077574
n×3 385616361
n×4 514155148
n×5 642693935

Division

n÷y
n÷2 64269393.5
n÷3 42846262.333333
n÷3 32134696.75
n÷5 25707757.4

Exponentiation

ny
n2 16522219763431369
n3 2.1237460869389E+24
n4 2.7298374591112E+32
n5 3.5088999570132E+40

Nth Root

y√n
2√n 11337.494740903
3√n 504.67454375453
4√n 106.47767249946
5√n 41.860734030095

Divisors of 128538787

1, 13, 9887599, 128538787

4 divisors

τ Total Divisors 4
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -128538786
Sum of the proper positive divisors of n
A Arithmetic Mean 0.25
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 4
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 128538787 can be divided by 4 positive divisors. The sum of these divisors (counting 128538787) is 1, the average is 0.25.

Base conversion 128538787

Base System Value
2 Binary 111101010010101100010100011
3 Ternary 22221212110001211
4 Quaternary 13222111202203
5 Quinary 230401220122
6 Senary 20431010551
8 Octal 752254243
10 Decimal 128538787
12 Duodecimal 37069a57
16 Hexadecimal 7a958a3
20 Vigesimal 20376j7
36 Base36 24j15v

Cryptographic Hash Functions

md5 ec1ce732b5f3fb68b849667444d08ece
sha1 3898babc086c8fa0cb919f3df86b38c59a07d11d
sha256 67ea49b31f7d9dd20515a1ea07306df8f6af3eac6ffe8ecdfbd4056dfa9d5d0b
sha512 32d032f3f965914fc5ddfbaec5fdb035b7cebf53128745f59f75511a802080cf95fa9ebc9ece47338dbc54a178a36c35e9e6edf0dabcf7e5b1c980353cb35709
ripemd-160 daaaca9c441c064724340c7284d4f3108b447f29

128538787 as geometric shapes

Circle

Radius = n
Diameter 257077574
Circumference 807633017.88109
Area 5.1906084229792E+16

Sphere

Radius = n
Volume 8.8959268064231E+24
Surface area 2.0762433691917E+17
Circumference 807633017.88109

Square

Length = n
Perimeter 514155148
Area 16522219763431369
Diagonal 181781295.86639

Cube

Length = n
Surface area 99133318580588214
Volume 2.1237460869389E+24
Space diagonal 222635709.82727

Equilateral Triangle

Length = n
Perimeter 385616361
Area 7.1543310210204E+15
Altitude 111317854.91364

Triangular Pyramid

Length = n
Surface area 7.1543310210204E+15
Volume 2.5028587659881E+23
Height 60593765.288796