Max	9223372036854775807
25835	Positive integer
0b10001100	Binary number
01771452	Octal number
0x129abf	Hex number
5.012 * 10^7	Scientific notation
2^4 * 5	Factorized form
*	Random number

21087978 (number)

21087978 is an even 8-digits composite number following 21087977 and preceding 21087979. In scientific notation, it is written as 2.1087978 × 10^7. The sum of its digits is 42. It has a total of 3 prime factors and 8 positive divisors. There are 7029324 positive integers (up to 21087978) that are relatively prime to 21087978.

Interesting facts

21087978 has 8 divisors, whose sum is 42175968
The reverse of 21087978 is 87978012
Previous prime number is 3

Basic properties

Is Prime? no
Number parity even
Number length 8
Sum of Digits 42
Digital Root 6

Name

Name	twenty-one million eighty-seven thousand nine hundred seventy-eight

Notation

Scientific notation	2.1087978 × 10^7
Engineering notation	2.1087978 × 10^6

Prime Factorization of 21087978

Prime Factorization 2 × 3 × 3514663

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	21087978	Product of the distinct prime numbers

The prime factorization of 21087978 is 2 × 3 × 3514663. Since it has a total of 3 prime factors.

Most popular turbo-numbers

1, 7, 35, 16, 779, 198, 8406, 2313, 49250, 45277, 367336, 826471, 3170239, 643914, 39826464, 80008680, 320791990, 647800572, 8120772515, 8952484229

Basic calculations (n = 21087978)

Multiplication

n×y

n×2	42175956
n×3	63263934
n×4	84351912
n×5	105439890

Division

n÷y

n÷2	10543989
n÷3	7029326
n÷3	5271994.5
n÷5	4217595.6

Exponentiation

n^y

n²	444702816128484
n³	9.3778832030555E+21
n⁴	1.977605946726E+29
n⁵	4.1703710697228E+36

Nth Root

^y√n

²√n	4592.1648489574
³√n	276.27715804881
⁴√n	67.765513714259
⁵√n	29.161307198232

Divisors of 21087978

1, 2, 3, 6, 3514663, 7029326, 10543989, 21087978

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	-21087977	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 21087978 can be divided by 8 positive divisors. The sum of these divisors (counting 21087978) is 1, the average is 0.125.

Base conversion 21087978

Base	System	Value
2	Binary	1010000011100011011101010
3	Ternary	1110200101021020
4	Quaternary	1100130123222
5	Quinary	20344303403
6	Senary	2031553310
8	Octal	120343352
10	Decimal	21087978
12	Duodecimal	708b836
16	Hexadecimal	141c6ea
20	Vigesimal	6bfjii
36	Base36	cjzl6

Cryptographic Hash Functions

md5	11ad9a9659c3e410cffd9838b0fc36ce
sha1	192b582b39fc32ba364e27a75a9da12093772cc2
sha256	1cd3fb9d242a30da314022f4d2c52a5e292da257ccac838c8de995034c0f13b6
sha512	8de5886f9becc5cea80c0be5673da532c6ca89bfe1d6457f7730ab7f80010690277a45738bba1e9587404855fb23e178c14a167738fd8298d3282b31f6280660
ripemd-160	f4b794ba70ef15391ea0e48a7155b8d7fca19721

21087978 as geometric shapes

Circle

Radius = n

Diameter	42175956
Circumference	132499673.52773
Area	1.3970751001799E+15

Sphere

Radius = n

Volume	3.928198530259E+22
Surface area	5.5883004007198E+15
Circumference	132499673.52773

Square

Length = n

Perimeter	84351912
Area	444702816128484
Diagonal	29822904.490625

Cube

Length = n

Surface area	2668216896770904
Volume	9.3778832030555E+21
Space diagonal	36525449.324895

Equilateral Triangle

Length = n

Perimeter	63263934
Area	1.9256196795087E+14
Altitude	18262724.662447

Triangular Pyramid

Length = n

Surface area	1.9256196795087E+14
Volume	1.1051941343427E+21
Height	9940968.1635418