21787890 (number)

21787890 is an even 8-digits composite number following 21787889 and preceding 21787891. In scientific notation, it is written as 2.1787890 × 10^7. The sum of its digits is 42. It has a total of 4 prime factors and 16 positive divisors. There are 5792064 positive integers (up to 21787890) that are relatively prime to 21787890.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 2.1787890 × 10^7
Engineering notation 2.1787890 × 10^6

Prime Factorization of 21787890

Prime Factorization 2 × 15 × 1867 × 389

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 21787890
Product of the distinct prime numbers

The prime factorization of 21787890 is 2 × 15 × 1867 × 389. Since it has a total of 4 prime factors.

Most popular turbo-numbers

9, 1, 51, 60, 858, 612, 1836, 8420, 16258, 71070, 515423, 75640, 2888852, 5023046, 66491699, 33943408, 949953619, 56129602, 60024283, 9289342563

Basic calculations (n = 21787890)

Multiplication

n×y
n×2 43575780
n×3 65363670
n×4 87151560
n×5 108939450

Division

n÷y
n÷2 10893945
n÷3 7262630
n÷3 5446972.5
n÷5 4357578

Exponentiation

ny
n2 474712150652100
n3 1.0342976120071E+22
n4 2.2535162597674E+29
n5 4.9099364381024E+36

Nth Root

y√n
2√n 4667.7499933051
3√n 279.30050739257
4√n 68.320933785372
5√n 29.352360641771

Divisors of 21787890

1, 2, 15, 30, 389, 778, 1867, 3734, 5835, 11670, 28005, 56010, 726263, 1452526, 10893945, 21787890

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 -21787889
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 21787890 can be divided by 16 positive divisors. The sum of these divisors (counting 21787890) is 1, the average is 0.0625.

Base conversion 21787890

Base System Value
2 Binary 1010011000111010011110010
3 Ternary 1111222221100220
4 Quaternary 1103013103302
5 Quinary 21034203030
6 Senary 2054553510
8 Octal 123072362
10 Decimal 21787890
12 Duodecimal 7368896
16 Hexadecimal 14c74f2
20 Vigesimal 6g39ea
36 Base36 cyzn6

Cryptographic Hash Functions

md5 693f587506009ee2f69ac210d70625c6
sha1 e4265b39d6688abdea3a039922a1905cf391766f
sha256 24f5e7400e690303cf479a07d9d514c98fcce38f1c755bb30a1ba724eb245089
sha512 56181f0cd2aec66acb5d5fad5c2d0ee86acd8c3b3ae81012200a3d563ee2f70d60c3a901e4088716e66683bb1b47edd69913da0566fc2a12acbbb0d24c41261f
ripemd-160 1c81eaf6ec8c43c7be71d76eee38521f30295d85

21787890 as geometric shapes

Circle

Radius = n
Diameter 43575780
Circumference 136897350.32245
Area 1.4913522050584E+15

Sphere

Radius = n
Volume 4.3324557060095E+22
Surface area 5.9654088202338E+15
Circumference 136897350.32245

Square

Length = n
Perimeter 87151560
Area 474712150652100
Diagonal 30812729.533493

Cube

Length = n
Surface area 2848272903912600
Volume 1.0342976120071E+22
Space diagonal 37737732.469722

Equilateral Triangle

Length = n
Perimeter 65363670
Area 2.0555639097493E+14
Altitude 18868866.234861

Triangular Pyramid

Length = n
Surface area 2.0555639097493E+14
Volume 1.2189314253588E+21
Height 10270909.844498