28931987 (number)

28931987 is an odd 8-digits composite number following 28931986 and preceding 28931988. In scientific notation, it is written as 2.8931987 × 10^7. The sum of its digits is 47. It has a total of 3 prime factors and 8 positive divisors. There are 24716232 positive integers (up to 28931987) that are relatively prime to 28931987.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 2.8931987 × 10^7
Engineering notation 2.8931987 × 10^6

Prime Factorization of 28931987

Prime Factorization 7 × 307 × 13463

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 3
Total number of prime factors
rad Radical 28931987
Product of the distinct prime numbers

The prime factorization of 28931987 is 7 × 307 × 13463. Since it has a total of 3 prime factors.

Most popular turbo-numbers

10, 2, 49, 33, 342, 169, 433, 9065, 60187, 36851, 954930, 953071, 7268299, 305904, 9717639, 55416107, 717517077, 654084168, 6628940073, 3066704512

Basic calculations (n = 28931987)

Multiplication

n×y
n×2 57863974
n×3 86795961
n×4 115727948
n×5 144659935

Division

n÷y
n÷2 14465993.5
n÷3 9643995.6666667
n÷3 7232996.75
n÷5 5786397.4

Exponentiation

ny
n2 837059871768169
n3 2.4217805328218E+22
n4 7.0066922892454E+29
n5 2.0271753022545E+37

Nth Root

y√n
2√n 5378.8462517533
3√n 306.99131354358
4√n 73.340618021348
5√n 31.065307172509

Divisors of 28931987

1, 7, 307, 2149, 13463, 94241, 4133141, 28931987

8 divisors

τ Total Divisors 8
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -28931986
Sum of the proper positive divisors of n
A Arithmetic Mean 0.125
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 8
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 28931987 can be divided by 8 positive divisors. The sum of these divisors (counting 28931987) is 1, the average is 0.125.

Base conversion 28931987

Base System Value
2 Binary 1101110010111011110010011
3 Ternary 2000102220020002
4 Quaternary 1232113132103
5 Quinary 24401310422
6 Senary 2512040215
8 Octal 156273623
10 Decimal 28931987
12 Duodecimal 983306b
16 Hexadecimal 1b97793
20 Vigesimal 90g9j7
36 Base36 h842b

Cryptographic Hash Functions

md5 be3324c143b76d3c20d8851388d6eedf
sha1 ef3085dac693526170c152f7653ee0a15852893a
sha256 0d7934bd01e48e541e0b533f89582431588854607965803d099ea661efc75b0e
sha512 1feaca8e9717015d9ea5e620b38517d15902b7cb41684c5f9224ffb55be5f70546fc24fa63093ad86e8228342faa8ed9967fc4aa7861a68ff8761bb1a75e2fc0
ripemd-160 f9efd546b94afdf23df76afceabb0f1a26edc6cb

28931987 as geometric shapes

Circle

Radius = n
Diameter 57863974
Circumference 181785035.62591
Area 2.6297011437617E+15

Sphere

Radius = n
Volume 1.0144330574026E+23
Surface area 1.0518804575047E+16
Circumference 181785035.62591

Square

Length = n
Perimeter 115727948
Area 837059871768169
Diagonal 40916008.401802

Cube

Length = n
Surface area 5022359230609014
Volume 2.4217805328218E+22
Space diagonal 50111671.447922

Equilateral Triangle

Length = n
Perimeter 86795961
Area 3.6245755671989E+14
Altitude 25055835.723961

Triangular Pyramid

Length = n
Surface area 3.6245755671989E+14
Volume 2.8540957288398E+21
Height 13638669.467267