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

81998918 (number)

81998918 is an even 8-digits composite number following 81998917 and preceding 81998919. In scientific notation, it is written as 8.1998918 × 10^7. The sum of its digits is 53. It has a total of 3 prime factors and 8 positive divisors. There are 40601304 positive integers (up to 81998918) that are relatively prime to 81998918.

Interesting facts

81998918 has 8 divisors, whose sum is 124192848
The reverse of 81998918 is 81989918
Previous prime number is 103

Basic properties

Is Prime? no
Number parity even
Number length 8
Sum of Digits 53
Digital Root 8

Name

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

Notation

Scientific notation	8.1998918 × 10^7
Engineering notation	8.1998918 × 10^6

Prime Factorization of 81998918

Prime Factorization 2 × 103 × 398053

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	81998918	Product of the distinct prime numbers

The prime factorization of 81998918 is 2 × 103 × 398053. Since it has a total of 3 prime factors.

Most popular turbo-numbers

7, 5, 97, 18, 417, 897, 3286, 3172, 39515, 10569, 199924, 160128, 348096, 7664690, 2987327, 58633991, 682780203, 484339942, 6563406850, 4588442133

Basic calculations (n = 81998918)

Multiplication

n×y

n×2	163997836
n×3	245996754
n×4	327995672
n×5	409994590

Division

n÷y

n÷2	40999459
n÷3	27332972.666667
n÷3	20499729.5
n÷5	16399783.6

Exponentiation

n^y

n²	6723822553170724
n³	5.51346174184E+23
n⁴	4.5209789726527E+31
n⁵	3.7071538405828E+39

Nth Root

^y√n

²√n	9055.3253944847
³√n	434.44623770302
⁴√n	95.159473487849
⁵√n	38.261467604913

Divisors of 81998918

1, 2, 103, 206, 398053, 796106, 40999459, 81998918

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	-81998917	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 81998918 can be divided by 8 positive divisors. The sum of these divisors (counting 81998918) is 1, the average is 0.125.

Base conversion 81998918

Base	System	Value
2	Binary	100111000110011010001000110
3	Ternary	12201021222100222
4	Quaternary	10320303101012
5	Quinary	131442431133
6	Senary	12045304342
8	Octal	470632106
10	Decimal	81998918
12	Duodecimal	235650b2
16	Hexadecimal	4e33446
20	Vigesimal	15c9h5i
36	Base36	1ctirq

Cryptographic Hash Functions

md5	f924f62da9fec0511273072252b33d15
sha1	0703f9cd8d76d7aedc50c124c39eb22547cea3cc
sha256	e61a7c56b43480a75a16c15be7fab71a07102a4306937d90b230cb9207a167a1
sha512	36cd8af5c52d67956f1f3976db6aa8065ad9bd89c807959ac3ac94d059733260ebf8bdf378a00b863603c923fad414ed02ea36fedfebbb64bc90fbb9c3009461
ripemd-160	93a463cee7387620f55c75768b5a1d45117ca21c

81998918 as geometric shapes

Circle

Radius = n

Diameter	163997836
Circumference	515214396.78222
Area	2.1123511537083E+16

Sphere

Radius = n

Volume	2.3094734538684E+24
Surface area	8.449404614833E+16
Circumference	515214396.78222

Square

Length = n

Perimeter	327995672
Area	6723822553170724
Diagonal	115963981.93552

Cube

Length = n

Surface area	40342935319024344
Volume	5.51346174184E+23
Space diagonal	142026292.14167

Equilateral Triangle

Length = n

Perimeter	245996754
Area	2.9115005707923E+15
Altitude	71013146.070837

Triangular Pyramid

Length = n

Surface area	2.9115005707923E+15
Volume	6.4976769757794E+22
Height	38654660.645173