Max	9223372036854775807
25835	Positive integer
0b10001100	Binary number
01771452	Octal number
0x129abf	Hex number
5.012 * 10^7	Scientific notation
2^4 * 5	Factorized form
*	Random number

28307981 (number)

28307981 is an odd 8-digits composite number following 28307980 and preceding 28307982. In scientific notation, it is written as 2.8307981 × 10^7. The sum of its digits is 38. It has a total of 2 prime factors and 4 positive divisors. There are 26130432 positive integers (up to 28307981) that are relatively prime to 28307981.

Interesting facts

28307981 has 4 divisors, whose sum is 30485532
The reverse of 28307981 is 18970382
Previous prime number is 13

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 38
Digital Root 2

Name

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

Notation

Scientific notation	2.8307981 × 10^7
Engineering notation	2.8307981 × 10^6

Prime Factorization of 28307981

Prime Factorization 13 × 2177537

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	28307981	Product of the distinct prime numbers

The prime factorization of 28307981 is 13 × 2177537. Since it has a total of 2 prime factors.

Most popular turbo-numbers

1, 8, 84, 87, 429, 142, 1282, 4920, 17562, 68825, 211872, 804347, 9202913, 1751714, 86799609, 94094226, 637833901, 712534290, 1931086176, 6591649366

Basic calculations (n = 28307981)

Multiplication

n×y

n×2	56615962
n×3	84923943
n×4	113231924
n×5	141539905

Division

n÷y

n÷2	14153990.5
n÷3	9435993.6666667
n÷3	7076995.25
n÷5	5661596.2

Exponentiation

n^y

n²	801341788296361
n³	2.2684368117599E+22
n⁴	6.4214866167001E+29
n⁵	1.817793211373E+37

Nth Root

^y√n

²√n	5320.5245042195
³√n	304.76818720037
⁴√n	72.941925558759
⁵√n	30.930132402361

Divisors of 28307981

1, 13, 2177537, 28307981

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	-28307980	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 28307981 can be divided by 4 positive divisors. The sum of these divisors (counting 28307981) is 1, the average is 0.25.

Base conversion 28307981

Base	System	Value
2	Binary	1101011111111001000001101
3	Ternary	1222021012020202
4	Quaternary	1223333020031
5	Quinary	24221323411
6	Senary	2450423245
8	Octal	153771015
10	Decimal	28307981
12	Duodecimal	9591b25
16	Hexadecimal	1aff20d
20	Vigesimal	8gi9j1
36	Base36	guqkt

Cryptographic Hash Functions

md5	42a79f9f7be016cfff664e5e4fc4d8ab
sha1	05d272556e638880fe6f5fbd94f4200a666fa14c
sha256	4e59d3c38ba4f56bdb0aee169645c064128ce4b77f51b917f9e438f6ad4ef503
sha512	d6a358b42799824414fafdc6ebed1666584e36b988101d46e271f68e46898f77db290d38a6e2755d76cbf8cd3a2396d89256c1e61c25821fd6f83183d54ba253
ripemd-160	9c1d031c03b62d1d847ab5f1f5e3136c7ceee5a3

28307981 as geometric shapes

Circle

Radius = n

Diameter	56615962
Circumference	177864290.29512
Area	2.5174894751264E+15

Sphere

Radius = n

Volume	9.5020058972769E+22
Surface area	1.0069957900505E+16
Circumference	177864290.29512

Square

Length = n

Perimeter	113231924
Area	801341788296361
Diagonal	40033530.6536

Cube

Length = n

Surface area	4808050729778166
Volume	2.2684368117599E+22
Space diagonal	49030861.351694

Equilateral Triangle

Length = n

Perimeter	84923943
Area	3.4699117288935E+14
Altitude	24515430.675847

Triangular Pyramid

Length = n

Surface area	3.4699117288935E+14
Volume	2.6733784204811E+21
Height	13344510.217867