81574890 is an even 8-digits composite number following 81574889
and preceding 81574891 . In scientific notation, it is written as 8.1574890 × 10^7.
The sum of its digits is 42. It has a total of 5 prime factors and 24 positive divisors.
There are 21372480 positive integers (up to 81574890) that are relatively prime to 81574890.
81574890 has 24 divisors, whose sum is 132826176
The reverse of 81574890 is 09847518
Previous prime number is 181
Is Prime? no
Number parity even
Number length 8
Sum of Digits 42
Digital Root 6
Name
eighty-one million five hundred seventy-four thousand eight hundred ninety
Scientific notation
8.1574890 × 10^7
Engineering notation
8.1574890 × 10^6
Prime Factorization
2 × 15 × 83 × 181 × 181
Composite number
ω
Distinct Factors
4
Total number of distinct prime factors
Ω
Total Factors
5
Total number of prime factors
rad
Radical
450690
Product of the distinct prime numbers
The prime factorization of 81574890 is 2 × 15 × 83 × 181 × 181.
Since it has a total of 5 prime factors.
5 , 7 , 34 , 53 , 4 , 833 , 1077 , 3324 , 75200 , 59822 , 347320 , 471459 , 3038175 , 937930 , 68777742 , 1230283 , 632218770 , 553585844 , 9004560531 , 8012183190
n×2
163149780
n×3
244724670
n×4
326299560
n×5
407874450
n÷2
40787445
n÷3
27191630
n÷3
20393722.5
n÷5
16314978
n2
6654462678512100
n3
5.4283706100873E+23
n4
4.428187353971E+31
n5
3.6122889629958E+39
2 √n
9031.8818637092
3 √n
433.69608218389
4 √n
95.03621343314
5 √n
38.221814407081
1 , 2 , 15 , 30 , 83 , 166 , 181 , 362 , 1245 , 2490 , 2715 , 5430 , 15023 , 30046 , 32761 , 65522 , 225345 , 450690 , 491415 , 982830 , 2719163 , 5438326 , 40787445 , 81574890
24 divisors
τ
Total Divisors
24
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-81574889
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.041666666666667
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
24
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 81574890 can be divided by 24 positive divisors.
The sum of these divisors (counting 81574890) is 1, the average is 0.041666666666667.
Base
System
Value
2
Binary
100110111001011101111101010
3
Ternary
12200111102201020
4
Quaternary
10313023233222
5
Quinary
131340344030
6
Senary
12032233310
8
Octal
467135752
10
Decimal
81574890
12
Duodecimal
2339b836
16
Hexadecimal
4dcbbea
20
Vigesimal
159gh4a
36
Base36
1ckfl6
md5
c950e87a6bfbc81cf2b84f4c3cb0d6bf
sha1
8f70a50b932f2b2feb5e3f2512cb74372a2ba664
sha256
52affcfbb9e3b8abde135bf957798c3ea8844bc1243163102430ac1f5afbb854
sha512
b9c16bbea019eeb6517d4d9066503778d82c1f1921c3855add10edf2ee7cfddaf3a9defb9555a8a9e9cc0a387829cc042121769419d4992a830c8c76b2f59ed3
ripemd-160
e5ab35fca7f72a98defa456a7abf569bb2700767
Diameter
163149780
Circumference
512550150.28279
Area
2.0905611064401E+16
Volume
2.2738305639484E+24
Surface area
8.3622444257604E+16
Circumference
512550150.28279
Perimeter
326299560
Area
6654462678512100
Diagonal
115364315.78709
Surface area
39926776071072600
Volume
5.4283706100873E+23
Space diagonal
141291854.10184
Perimeter
244724670
Area
2.8814668640635E+15
Altitude
70645927.050921
Surface area
2.8814668640635E+15
Volume
6.3973961153108E+22
Height
38454771.929031