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

81491372 (number)

81491372 is an even 8-digits composite number following 81491371 and preceding 81491373. In scientific notation, it is written as 8.1491372 × 10^7. The sum of its digits is 35. It has a total of 3 prime factors and 6 positive divisors. There are 40745684 positive integers (up to 81491372) that are relatively prime to 81491372.

Interesting facts

81491372 has 6 divisors, whose sum is 142609908
The reverse of 81491372 is 27319418
Previous prime number is 2

Basic properties

Is Prime? no
Number parity even
Number length 8
Sum of Digits 35
Digital Root 8

Name

Name	eighty-one million four hundred ninety-one thousand three hundred seventy-two

Notation

Scientific notation	8.1491372 × 10^7
Engineering notation	8.1491372 × 10^6

Prime Factorization of 81491372

Prime Factorization 2 × 2 × 20372843

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	40745686	Product of the distinct prime numbers

The prime factorization of 81491372 is 2 × 2 × 20372843. Since it has a total of 3 prime factors.

Most popular turbo-numbers

4, 7, 9, 19, 802, 278, 3630, 8948, 75431, 41783, 978674, 49487, 4956889, 3595760, 49728713, 68941241, 810589850, 805477793, 2059725203, 375807749

Basic calculations (n = 81491372)

Multiplication

n×y

n×2	162982744
n×3	244474116
n×4	325965488
n×5	407456860

Division

n÷y

n÷2	40745686
n÷3	27163790.666667
n÷3	20372843
n÷5	16298274.4

Exponentiation

n^y

n²	6640843710442384
n³	5.4117146520152E+23
n⁴	4.4100805186522E+31
n⁵	3.5938351209544E+39

Nth Root

^y√n

²√n	9027.2571692624
³√n	433.54802274291
⁴√n	95.011879095524
⁵√n	38.213984748718

Divisors of 81491372

1, 2, 4, 20372843, 40745686, 81491372

6 divisors

τ	Total Divisors	6	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-81491371	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.16666666666667	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	6	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81491372 can be divided by 6 positive divisors. The sum of these divisors (counting 81491372) is 1, the average is 0.16666666666667.

Base conversion 81491372

Base	System	Value
2	Binary	100110110110111010110101100
3	Ternary	12200100012010222
4	Quaternary	10312313112230
5	Quinary	131330210442
6	Senary	12030350512
8	Octal	466672654
10	Decimal	81491372
12	Duodecimal	2335b438
16	Hexadecimal	4db75ac
20	Vigesimal	159688c
36	Base36	1cin58

Cryptographic Hash Functions

md5	64338cff63f9bd61b95cd3081ae651cb
sha1	aebe744e437e02b00a370c7b77674b1a971dfce9
sha256	bfa3378d6096b86ef2deca9b663c5684a2edd5a68f4db779bef13d9ccce3672f
sha512	32ebe7194f241fb74aba141ed6ae60dc422f1d844985a192fbf5c717fa683874c8dc2988a54e1d17219606ea25dcd7a68368333c99e9b96d9caf3336396601ed
ripemd-160	7adf5cecb0eb4740977b5214f152565e2504d970

81491372 as geometric shapes

Circle

Radius = n

Diameter	162982744
Circumference	512025391.21231
Area	2.0862825814364E+16

Sphere

Radius = n

Volume	2.266853732546E+24
Surface area	8.3451303257455E+16
Circumference	512025391.21231

Square

Length = n

Perimeter	325965488
Area	6640843710442384
Diagonal	115246203.49879

Cube

Length = n

Surface area	39845062262654304
Volume	5.4117146520152E+23
Space diagonal	141147196.6825

Equilateral Triangle

Length = n

Perimeter	244474116
Area	2.8755696779026E+15
Altitude	70573598.341248

Triangular Pyramid

Length = n

Surface area	2.8755696779026E+15
Volume	6.3777668804776E+22
Height	38415401.166264