28931985 (number)

28931985 is an odd 8-digits composite number following 28931984 and preceding 28931986. In scientific notation, it is written as 2.8931985 × 10^7. The sum of its digits is 45. It has a total of 4 prime factors and 16 positive divisors. There are 15430176 positive integers (up to 28931985) that are relatively prime to 28931985.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 2.8931985 × 10^7
Engineering notation 2.8931985 × 10^6

Prime Factorization of 28931985

Prime Factorization 9 × 3 × 15 × 71437

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 28931985
Product of the distinct prime numbers

The prime factorization of 28931985 is 9 × 3 × 15 × 71437. Since it has a total of 4 prime factors.

Most popular turbo-numbers

1, 9, 38, 81, 810, 160, 9375, 3308, 24185, 39521, 734008, 764733, 6834533, 3780252, 77563033, 94665834, 916094594, 427699505, 2536592185, 7175401434

Basic calculations (n = 28931985)

Multiplication

n×y
n×2 57863970
n×3 86795955
n×4 115727940
n×5 144659925

Division

n÷y
n÷2 14465992.5
n÷3 9643995
n÷3 7232996.25
n÷5 5786397

Exponentiation

ny
n2 837059756040225
n3 2.4217800305859E+22
n4 7.0066903518212E+29
n5 2.0271746015854E+37

Nth Root

y√n
2√n 5378.8460658398
3√n 306.99130646972
4√n 73.340616753882
5√n 31.065306743014

Divisors of 28931985

1, 3, 9, 15, 27, 45, 135, 405, 71437, 214311, 642933, 1071555, 1928799, 3214665, 9643995, 28931985

16 divisors

τ Total Divisors 16
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -28931984
Sum of the proper positive divisors of n
A Arithmetic Mean 0.0625
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 16
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 28931985 can be divided by 16 positive divisors. The sum of these divisors (counting 28931985) is 1, the average is 0.0625.

Base conversion 28931985

Base System Value
2 Binary 1101110010111011110010001
3 Ternary 2000102220020000
4 Quaternary 1232113132101
5 Quinary 24401310420
6 Senary 2512040213
8 Octal 156273621
10 Decimal 28931985
12 Duodecimal 9833069
16 Hexadecimal 1b97791
20 Vigesimal 90g9j5
36 Base36 h8429

Cryptographic Hash Functions

md5 9aadd648a3304b4139c4aa9c77dc7499
sha1 177142abe0d2150981f6b8cdf148027e9ee4f3bf
sha256 12c4c251ca4b70eb6e50a363ac82ee604d6d5d1f5e3a15c43df028f7eadb2456
sha512 95abf42e0f0351aeb74035156a9a9a527abf61fe0f7db0e765c32c769f9b0146fcd6bb5c0a9ea7a0c2195226b9c4b4f9858b3e3218dd4c50c62df4612a0e94e7
ripemd-160 1850ccee60c8b11065adf46a9dc4478cf035c702

28931985 as geometric shapes

Circle

Radius = n
Diameter 57863970
Circumference 181785023.05954
Area 2.6297007801916E+15

Sphere

Radius = n
Volume 1.0144328470266E+23
Surface area 1.0518803120767E+16
Circumference 181785023.05954

Square

Length = n
Perimeter 115727940
Area 837059756040225
Diagonal 40916005.573375

Cube

Length = n
Surface area 5022358536241350
Volume 2.4217800305859E+22
Space diagonal 50111667.983821

Equilateral Triangle

Length = n
Perimeter 86795955
Area 3.6245750660822E+14
Altitude 25055833.99191

Triangular Pyramid

Length = n
Surface area 3.6245750660822E+14
Volume 2.8540951369491E+21
Height 13638668.524458