21988 (number)

21988 is an even 5-digits composite number following 21987 and preceding 21989. In scientific notation, it is written as 2.1988 × 10^4. The sum of its digits is 28. It has a total of 4 prime factors and 12 positive divisors. There are 10472 positive integers (up to 21988) that are relatively prime to 21988.

Interesting facts

Basic properties

Name

Name twenty-one thousand nine hundred eighty-eight

Notation

Scientific notation 2.1988 × 10^4
Engineering notation 2.1988 × 10^3

Prime Factorization of 21988

Prime Factorization 2 × 2 × 23 × 239

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 10994
Product of the distinct prime numbers

The prime factorization of 21988 is 2 × 2 × 23 × 239. Since it has a total of 4 prime factors.

Most popular turbo-numbers

7, 9, 4, 34, 502, 179, 478, 5254, 63078, 37368, 588241, 814826, 2747468, 9999723, 89403454, 2026345, 311267784, 616333321, 9780635650, 2532380638

Basic calculations (n = 21988)

Multiplication

n×y
n×2 43976
n×3 65964
n×4 87952
n×5 109940

Division

n÷y
n÷2 10994
n÷3 7329.3333333333
n÷3 5497
n÷5 4397.6

Exponentiation

ny
n2 483472144
n3 10630585502272
n4 233745314023956736
n5 5.1395919647588E+21

Nth Root

y√n
2√n 148.28351223248
3√n 28.015297763014
4√n 12.177171766567
5√n 7.3864735269539

Divisors of 21988

1, 2, 4, 23, 46, 92, 239, 478, 956, 5497, 10994, 21988

12 divisors

τ Total Divisors 12
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21987
Sum of the proper positive divisors of n
A Arithmetic Mean 0.083333333333333
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 12
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21988 can be divided by 12 positive divisors. The sum of these divisors (counting 21988) is 1, the average is 0.083333333333333.

Base conversion 21988

Base System Value
2 Binary 101010111100100
3 Ternary 1010011101
4 Quaternary 11113210
5 Quinary 1200423
6 Senary 245444
8 Octal 52744
10 Decimal 21988
12 Duodecimal 10884
16 Hexadecimal 55e4
20 Vigesimal 2ej8
36 Base36 gys

Cryptographic Hash Functions

md5 fe4e2a8a9740bc9311616fc08781fcf9
sha1 a070f0e4628fd63fbe63d66dcb14ead86e8c50ca
sha256 e11e86fd30b080bcdd2ee4fcfc0b319ef20fe9decec1c0358534ec4b344b22d6
sha512 68e3aa06f99fbe3db549fdfc5e002068e0945e09e9311cb368cf848177c53fe82b6d5d92726a80dba87bdf4f24e42017910c13439ac48720ee0b98f57ab7f69d
ripemd-160 058d501e0353093ab783d0af51f77bdbf55028b6

21988 as geometric shapes

Circle

Radius = n
Diameter 43976
Circumference 138154.67853426
Area 1518872535.8057

Sphere

Radius = n
Volume 44529292423061
Surface area 6075490143.2228
Circumference 138154.67853426

Square

Length = n
Perimeter 87952
Area 483472144
Diagonal 31095.72780946

Cube

Length = n
Surface area 2900832864
Volume 10630585502272
Space diagonal 38084.333156824

Equilateral Triangle

Length = n
Perimeter 65964
Area 209349579.36306
Altitude 19042.166578412

Triangular Pyramid

Length = n
Surface area 209349579.36306
Volume 1252826516106.7
Height 10365.242603153