21787990 (number)

21787990 is an even 8-digits composite number following 21787989 and preceding 21787991. In scientific notation, it is written as 2.1787990 × 10^7. The sum of its digits is 43. It has a total of 4 prime factors and 16 positive divisors. There are 7211904 positive integers (up to 21787990) that are relatively prime to 21787990.

Interesting facts

Basic properties

Name

Name twenty-one million seven hundred eighty-seven thousand nine hundred ninety

Notation

Scientific notation 2.1787990 × 10^7
Engineering notation 2.1787990 × 10^6

Prime Factorization of 21787990

Prime Factorization 2 × 145 × 7 × 10733

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 21787990
Product of the distinct prime numbers

The prime factorization of 21787990 is 2 × 145 × 7 × 10733. Since it has a total of 4 prime factors.

Most popular turbo-numbers

7, 4, 25, 5, 902, 346, 8771, 4171, 92876, 74865, 123995, 863028, 7073255, 3161676, 65743073, 64843620, 198904398, 346525233, 5801156357, 7564181377

Basic calculations (n = 21787990)

Multiplication

n×y
n×2 43575980
n×3 65363970
n×4 87151960
n×5 108939950

Division

n÷y
n÷2 10893995
n÷3 7262663.3333333
n÷3 5446997.5
n÷5 4357598

Exponentiation

ny
n2 474716508240100
n3 1.034311853437E+22
n4 2.2535576319567E+29
n5 4.9100491149497E+36

Nth Root

y√n
2√n 4667.7607050919
3√n 279.30093469428
4√n 68.321012178479
5√n 29.35238758546

Divisors of 21787990

1, 2, 7, 14, 145, 290, 1015, 2030, 10733, 21466, 75131, 150262, 1556285, 3112570, 10893995, 21787990

16 divisors

τ Total Divisors 16
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21787989
Sum of the proper positive divisors of n
A Arithmetic Mean 0.0625
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 16
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21787990 can be divided by 16 positive divisors. The sum of these divisors (counting 21787990) is 1, the average is 0.0625.

Base conversion 21787990

Base System Value
2 Binary 1010011000111010101010110
3 Ternary 1111222221111121
4 Quaternary 1103013111112
5 Quinary 21034203430
6 Senary 2054554154
8 Octal 123072526
10 Decimal 21787990
12 Duodecimal 736895a
16 Hexadecimal 14c7556
20 Vigesimal 6g39ja
36 Base36 cyzpy

Cryptographic Hash Functions

md5 a249cd741f5168f5e17137a2f4823b20
sha1 47c3e86f55cb182c2142679019e20b7f439c368d
sha256 18c2fb48fe98a0a5d3ee4161ce69f0b5ddbc6d5541dae8c54c4eb575c3ad2505
sha512 0b92b6113bb24a7eb26481a3bb460f3f7e26d8a861377f2bcb9c5071621d69452bb2096375b28d1a574124e4c5dfc818ec6aec2750193556ac4128a10e586132
ripemd-160 a340d9f6149b92253f019117f16d9102b36ada26

21787990 as geometric shapes

Circle

Radius = n
Diameter 43575980
Circumference 136897978.64098
Area 1.4913658948249E+15

Sphere

Radius = n
Volume 4.3325153603715E+22
Surface area 5.9654635792996E+15
Circumference 136897978.64098

Square

Length = n
Perimeter 87151960
Area 474716508240100
Diagonal 30812870.954849

Cube

Length = n
Surface area 2848299049440600
Volume 1.034311853437E+22
Space diagonal 37737905.674803

Equilateral Triangle

Length = n
Perimeter 65363970
Area 2.0555827786589E+14
Altitude 18868952.837401

Triangular Pyramid

Length = n
Surface area 2.0555827786589E+14
Volume 1.2189482090449E+21
Height 10270956.98495