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

81491908 (number)

81491908 is an even 8-digits composite number following 81491907 and preceding 81491909. In scientific notation, it is written as 8.1491908 × 10^7. The sum of its digits is 40. It has a total of 4 prime factors and 12 positive divisors. There are 39644640 positive integers (up to 81491908) that are relatively prime to 81491908.

Interesting facts

81491908 has 12 divisors, whose sum is 146465452
The reverse of 81491908 is 80919418
Previous prime number is 37

Basic properties

Is Prime? no
Number parity even
Number length 8
Sum of Digits 40
Digital Root 4

Name

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

Notation

Scientific notation	8.1491908 × 10^7
Engineering notation	8.1491908 × 10^6

Prime Factorization of 81491908

Prime Factorization 2 × 2 × 37 × 550621

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	4	Total number of prime factors
rad	Radical	40745954	Product of the distinct prime numbers

The prime factorization of 81491908 is 2 × 2 × 37 × 550621. Since it has a total of 4 prime factors.

Most popular turbo-numbers

5, 9, 93, 80, 15, 613, 7082, 1405, 24973, 43437, 773397, 35250, 6647047, 3464696, 56412375, 71811560, 123493503, 365885353, 3448271438, 4371666950

Basic calculations (n = 81491908)

Multiplication

n×y

n×2	162983816
n×3	244475724
n×4	325967632
n×5	407459540

Division

n÷y

n÷2	40745954
n÷3	27163969.333333
n÷3	20372977
n÷5	16298381.6

Exponentiation

n^y

n²	6640931069480464
n³	5.4118214374844E+23
n⁴	4.4101965469591E+31
n⁵	3.5939533126671E+39

Nth Root

^y√n

²√n	9027.2868570795
³√n	433.54897327802
⁴√n	95.012035327528
⁵√n	38.214035018192

Divisors of 81491908

1, 2, 4, 37, 74, 148, 550621, 1101242, 2202484, 20372977, 40745954, 81491908

12 divisors

τ	Total Divisors	12	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-81491907	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.083333333333333	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	12	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81491908 can be divided by 12 positive divisors. The sum of these divisors (counting 81491908) is 1, the average is 0.083333333333333.

Base conversion 81491908

Base	System	Value
2	Binary	100110110110111011111000100
3	Ternary	12200100012212211
4	Quaternary	10312313133010
5	Quinary	131330220113
6	Senary	12030353204
8	Octal	466673704
10	Decimal	81491908
12	Duodecimal	2335b804
16	Hexadecimal	4db77c4
20	Vigesimal	15969f8
36	Base36	1cink4

Cryptographic Hash Functions

md5	5c105b3be43e8057939103cd975db973
sha1	622dbb21adf2a9d447d0e04ef87d0b5c25493f48
sha256	9096960d5afaeb42d7cda3a3e0bb90396707f8522d248f9aae7b67dee437a16d
sha512	89607e8c25e8f076bb0d4dec3401f1c613d4cd139aa5a976568aa4e67a898ccd1c7b465002e7ab7d09226ee9e6c9609da6a35639f8ff7273f61c43bfbd6aa644
ripemd-160	25d09d3c982896a2d35c1a9788cf35e465361ce8

81491908 as geometric shapes

Circle

Radius = n

Diameter	162983816
Circumference	512028758.99963
Area	2.0863100260876E+16

Sphere

Radius = n

Volume	2.2668984627388E+24
Surface area	8.3452401043504E+16
Circumference	512028758.99963

Square

Length = n

Perimeter	325967632
Area	6640931069480464
Diagonal	115246961.51726

Cube

Length = n

Surface area	39845586416882784
Volume	5.4118214374844E+23
Space diagonal	141148125.06173

Equilateral Triangle

Length = n

Perimeter	244475724
Area	2.8756075054757E+15
Altitude	70574062.530864

Triangular Pyramid

Length = n

Surface area	2.8756075054757E+15
Volume	6.37789272836E+22
Height	38415653.839087