21028405 (number)

21028405 is an odd 8-digits composite number following 21028404 and preceding 21028406. In scientific notation, it is written as 2.1028405 × 10^7. The sum of its digits is 22. It has a total of 3 prime factors and 8 positive divisors. There are 15833088 positive integers (up to 21028405) that are relatively prime to 21028405.

Interesting facts

Basic properties

Name

Name twenty-one million twenty-eight thousand four hundred five

Notation

Scientific notation 2.1028405 × 10^7
Engineering notation 2.1028405 × 10^6

Prime Factorization of 21028405

Prime Factorization 5 × 17 × 247393

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 3
Total number of prime factors
rad Radical 21028405
Product of the distinct prime numbers

The prime factorization of 21028405 is 5 × 17 × 247393. Since it has a total of 3 prime factors.

Most popular turbo-numbers

2, 4, 55, 86, 799, 31, 5048, 1248, 52273, 2863, 681034, 477032, 2207037, 5110298, 61598224, 72611231, 384184500, 311526235, 4501528975, 1086056060

Basic calculations (n = 21028405)

Multiplication

n×y
n×2 42056810
n×3 63085215
n×4 84113620
n×5 105142025

Division

n÷y
n÷2 10514202.5
n÷3 7009468.3333333
n÷3 5257101.25
n÷5 4205681

Exponentiation

ny
n2 442193816844025
n3 9.298630669092E+21
n4 1.9553537165509E+29
n5 4.1117969869887E+36

Nth Root

y√n
2√n 4585.6738872275
3√n 276.01675404142
4√n 67.717603968447
5√n 29.144812559097

Divisors of 21028405

1, 5, 17, 85, 247393, 1236965, 4205681, 21028405

8 divisors

τ Total Divisors 8
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21028404
Sum of the proper positive divisors of n
A Arithmetic Mean 0.125
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 8
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21028405 can be divided by 8 positive divisors. The sum of these divisors (counting 21028405) is 1, the average is 0.125.

Base conversion 21028405

Base System Value
2 Binary 1010000001101111000110101
3 Ternary 1110120100112211
4 Quaternary 1100031320311
5 Quinary 20340402110
6 Senary 2030413421
8 Octal 120157065
10 Decimal 21028405
12 Duodecimal 7061271
16 Hexadecimal 140de35
20 Vigesimal 6b8b05
36 Base36 cipmd

Cryptographic Hash Functions

md5 91a0479b40c9953035b6f38e19d7e34c
sha1 8dd1d819b8332e84595d488f791b98de00c0c557
sha256 b479f38c99b9c35b4674d306700777c7c10834c54b346f9331d9944ffd9a7d68
sha512 e0f2bf276c8e9c71344f1627d26cf9e56e3010170b55fecaa598e8cb62fef7cb025e937c3a15c3f60bfe36e8b7257719f8ad816b0fefe9055da44c9b7e9b6473
ripemd-160 a71a4220c7a568e942ae6c5505fe09122c496b84

21028405 as geometric shapes

Circle

Radius = n
Diameter 42056810
Circumference 132125365.32942
Area 1.38919284646E+15

Sphere

Radius = n
Volume 3.8950013064619E+22
Surface area 5.5567713858401E+15
Circumference 132125365.32942

Square

Length = n
Perimeter 84113620
Area 442193816844025
Diagonal 29738655.546074

Cube

Length = n
Surface area 2653162901064150
Volume 9.298630669092E+21
Space diagonal 36422265.862135

Equilateral Triangle

Length = n
Perimeter 63085215
Area 1.9147553939166E+14
Altitude 18211132.931068

Triangular Pyramid

Length = n
Surface area 1.9147553939166E+14
Volume 1.095854133644E+21
Height 9912885.1820247