21978840 (number)
21978840 is an even 8-digits composite number following 21978839 and preceding 21978841. In scientific notation, it is written as 2.1978840 × 10^7. The sum of its digits is 39. It has a total of 7 prime factors and 64 positive divisors. There are 5308416 positive integers (up to 21978840) that are relatively prime to 21978840.
Interesting facts
- 21978840 has 64 divisors, whose sum is 51681600
- The reverse of 21978840 is 04887912
- Previous prime number is 73
Basic properties
- Is Prime? no
- Number parity even
- Number length 8
- Sum of Digits 39
- Digital Root 3
Name
Name | twenty-one million nine hundred seventy-eight thousand eight hundred forty |
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Notation
Scientific notation | 2.1978840 × 10^7 |
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Engineering notation | 2.1978840 × 10^6 |
Prime Factorization of 21978840
Prime Factorization 2 × 2 × 2 × 39 × 5 × 73 × 193
Composite numberω | Distinct Factors | 5 | Total number of distinct prime factors |
---|---|---|---|
Ω | Total Factors | 7 | Total number of prime factors |
rad | Radical | 5494710 | Product of the distinct prime numbers |
The prime factorization of 21978840 is 2 × 2 × 2 × 39 × 5 × 73 × 193. Since it has a total of 7 prime factors.
Most popular turbo-numbers
Basic calculations (n = 21978840)
Multiplication
n×yn×2 | 43957680 |
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n×3 | 65936520 |
n×4 | 87915360 |
n×5 | 109894200 |
Division
n÷yn÷2 | 10989420 |
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n÷3 | 7326280 |
n÷3 | 5494710 |
n÷5 | 4395768 |
Exponentiation
nyn2 | 483069407745600 |
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n3 | 1.0617305221735E+22 |
n4 | 2.3335605269968E+29 |
n5 | 5.1288953453179E+36 |
Nth Root
y√n2√n | 4688.1595535988 |
---|---|
3√n | 280.11406916932 |
4√n | 68.470136217177 |
5√n | 29.403630292528 |
Divisors of 21978840
64 divisors
τ | Total Divisors | 64 | Total number of the positive divisors of n |
---|---|---|---|
σ | Sum of Divisors | 1 | Sum of all the positive divisors of n |
s | Aliquot Sum | -21978839 | Sum of the proper positive divisors of n |
A | Arithmetic Mean | 0.015625 | 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 | 64 | Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors |
The number 21978840 can be divided by 64 positive divisors. The sum of these divisors (counting 21978840) is 1, the average is 0.015625.
Base conversion 21978840
Base | System | Value |
---|---|---|
2 | Binary | 1010011110101111011011000 |
3 | Ternary | 1112100122022010 |
4 | Quaternary | 1103311323120 |
5 | Quinary | 21111310330 |
6 | Senary | 2103025520 |
8 | Octal | 123657330 |
10 | Decimal | 21978840 |
12 | Duodecimal | 743b2a0 |
16 | Hexadecimal | 14f5ed8 |
20 | Vigesimal | 6h7720 |
36 | Base36 | d32zc |
Cryptographic Hash Functions
md5 | c19090b8819e600b2d039e742650b255 |
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sha1 | 3fe4b01c4b6bcb01345faf5285a5e0916e03d6d6 |
sha256 | 549d1c80855caf52a0efe149f925eeece6590bf8ef511a5390c0a0aadf9bca17 |
sha512 | cb4eed4d9efbefe524fdd70697888d8c54ff1ebe1736a8e3b4050764a56e2df6020595d194c24476e1d6e4070c73ded76edce4b75f5f4cce6dd735a662b4dd77 |
ripemd-160 | 26f0f0cce2d38f855be747e57c4cb4db969ffab6 |
21978840 as geometric shapes
Circle
Radius = nDiameter | 43957680 |
---|---|
Circumference | 138097124.55685 |
Area | 1.5176073025475E+15 |
Sphere
Radius = nVolume | 4.4473664114032E+22 |
---|---|
Surface area | 6.0704292101902E+15 |
Circumference | 138097124.55685 |
Square
Length = nPerimeter | 87915360 |
---|---|
Area | 483069407745600 |
Diagonal | 31082773.613228 |
Cube
Length = nSurface area | 2898416446473600 |
---|---|
Volume | 1.0617305221735E+22 |
Space diagonal | 38068467.571427 |
Equilateral Triangle
Length = nPerimeter | 65936520 |
---|---|
Area | 2.091751894494E+14 |
Altitude | 19034233.785714 |
Triangular Pyramid
Length = nSurface area | 2.091751894494E+14 |
---|---|
Volume | 1.2512614200361E+21 |
Height | 10360924.537743 |