81489420 (number)
81489420 is an even 8-digits composite number following 81489419 and preceding 81489421. In scientific notation, it is written as 8.1489420 × 10^7. The sum of its digits is 36. It has a total of 6 prime factors and 48 positive divisors. There are 20579328 positive integers (up to 81489420) that are relatively prime to 81489420.
Interesting facts
- 81489420 has 48 divisors, whose sum is 179756640
- The reverse of 81489420 is 02498418
- Previous prime number is 29
Basic properties
- Is Prime? no
- Number parity even
- Number length 8
- Sum of Digits 36
- Digital Root 9
Name
Name | eighty-one million four hundred eighty-nine thousand four hundred twenty |
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Notation
Scientific notation | 8.1489420 × 10^7 |
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Engineering notation | 8.1489420 × 10^6 |
Prime Factorization of 81489420
Prime Factorization 2 × 2 × 2097 × 5 × 29 × 67
Composite numberω | Distinct Factors | 5 | Total number of distinct prime factors |
---|---|---|---|
Ω | Total Factors | 6 | Total number of prime factors |
rad | Radical | 40744710 | Product of the distinct prime numbers |
The prime factorization of 81489420 is 2 × 2 × 2097 × 5 × 29 × 67. Since it has a total of 6 prime factors.
Most popular turbo-numbers
Basic calculations (n = 81489420)
Multiplication
n×yn×2 | 162978840 |
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n×3 | 244468260 |
n×4 | 325957680 |
n×5 | 407447100 |
Division
n÷yn÷2 | 40744710 |
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n÷3 | 27163140 |
n÷3 | 20372355 |
n÷5 | 16297884 |
Exponentiation
nyn2 | 6640525571936400 |
---|---|
n3 | 5.4113257735227E+23 |
n4 | 4.4096579871541E+31 |
n5 | 3.5934047177156E+39 |
Nth Root
y√n2√n | 9027.1490516109 |
---|---|
3√n | 433.54456105743 |
4√n | 95.011310124695 |
5√n | 38.213801675563 |
Divisors of 81489420
48 divisors
τ | Total Divisors | 48 | Total number of the positive divisors of n |
---|---|---|---|
σ | Sum of Divisors | 1 | Sum of all the positive divisors of n |
s | Aliquot Sum | -81489419 | Sum of the proper positive divisors of n |
A | Arithmetic Mean | 0.020833333333333 | 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 | 48 | Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors |
The number 81489420 can be divided by 48 positive divisors. The sum of these divisors (counting 81489420) is 1, the average is 0.020833333333333.
Base conversion 81489420
Base | System | Value |
---|---|---|
2 | Binary | 100110110110110111000001100 |
3 | Ternary | 12200100002110200 |
4 | Quaternary | 10312312320030 |
5 | Quinary | 131330130140 |
6 | Senary | 12030333500 |
8 | Octal | 466667014 |
10 | Decimal | 81489420 |
12 | Duodecimal | 2335a290 |
16 | Hexadecimal | 4db6e0c |
20 | Vigesimal | 15963b0 |
36 | Base36 | 1ciln0 |
Cryptographic Hash Functions
md5 | 10a40803f3df6f03d0844b4a9a433270 |
---|---|
sha1 | 2f6e0f733ddd8eae7fa1d281281ace9d3f1bacbd |
sha256 | ec6a3d68afc91e437f57d7b153c49c4d422661afeca92f9e72ca687c3f57fa03 |
sha512 | 171a6929f03b096ff6f3b2c7bd370caa7469b4b08a2b2fb0d3976d0132d5f5f41ed3418cc3b6f2e8a9e989bc4b189af553ede285a889417d657c91438a8f646b |
ripemd-160 | bb7460fcd23d0b42f1780acebb7ecabf10e7e67c |
81489420 as geometric shapes
Circle
Radius = nDiameter | 162978840 |
---|---|
Circumference | 512013126.43459 |
Area | 2.0861826352771E+16 |
Sphere
Radius = nVolume | 2.266690839504E+24 |
---|---|
Surface area | 8.3447305411082E+16 |
Circumference | 512013126.43459 |
Square
Length = nPerimeter | 325957680 |
---|---|
Area | 6640525571936400 |
Diagonal | 115243442.95392 |
Cube
Length = nSurface area | 39843153431618400 |
---|---|
Volume | 5.4113257735227E+23 |
Space diagonal | 141143815.71932 |
Equilateral Triangle
Length = nPerimeter | 244468260 |
---|---|
Area | 2.8754319198886E+15 |
Altitude | 70571907.85966 |
Triangular Pyramid
Length = nSurface area | 2.8754319198886E+15 |
---|---|
Volume | 6.377308582779E+22 |
Height | 38414480.984639 |