688 (number)

688 is an even 3-digits composite number following 687 and preceding 689. In scientific notation, it is written as 6.88 × 10^2. The sum of its digits is 22. It has a total of 5 prime factors and 10 positive divisors. There are 336 positive integers (up to 688) that are relatively prime to 688.

Interesting facts

Basic properties

Name

Name six hundred eighty-eight

Notation

Scientific notation 6.88 × 10^2
Engineering notation 6.88 × 10^0

Prime Factorization of 688

Prime Factorization 2 × 2 × 2 × 2 × 43

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 86
Product of the distinct prime numbers

The prime factorization of 688 is 2 × 2 × 2 × 2 × 43. Since it has a total of 5 prime factors.

Most popular turbo-numbers

2, 4, 67, 49, 410, 37, 5442, 3152, 37659, 73241, 46363, 270722, 6756456, 8005299, 50719983, 96921054, 552715399, 379275233, 5611885570, 5870555797

Basic calculations (n = 688)

Multiplication

n×y
n×2 1376
n×3 2064
n×4 2752
n×5 3440

Division

n÷y
n÷2 344
n÷3 229.33333333333
n÷3 172
n÷5 137.6

Exponentiation

ny
n2 473344
n3 325660672
n4 224054542336
n5 154149525127168

Nth Root

y√n
2√n 26.229754097208
3√n 8.8280099248842
4√n 5.121499204062
5√n 3.6941768944161

Divisors of 688

1, 2, 4, 8, 16, 43, 86, 172, 344, 688

10 divisors

τ Total Divisors 10
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -687
Sum of the proper positive divisors of n
A Arithmetic Mean 0.1
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 10
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 688 can be divided by 10 positive divisors. The sum of these divisors (counting 688) is 1, the average is 0.1.

Base conversion 688

Base System Value
2 Binary 1010110000
3 Ternary 221111
4 Quaternary 22300
5 Quinary 10223
6 Senary 3104
8 Octal 1260
10 Decimal 688
12 Duodecimal 494
16 Hexadecimal 2b0
20 Vigesimal 1e8
36 Base36 j4

Cryptographic Hash Functions

md5 f79921bbae40a577928b76d2fc3edc2a
sha1 8ff059157542d2c31f0e43fc7f2325343e603875
sha256 1c63ed9164d61acfd1f4f3a7b6dfacbd98d1dc01e755b7b558c6af0491154a2e
sha512 a676e4925367f406c0ed31d927314301e7abcb4f85c82ab8b94822d886d6f8cfedd4493811b8efcb66f43672803f5c16f38c8aba58793b4cec6a9c6e9176d9cc
ripemd-160 1f7cce9cfb07b561e1d0a83d97b1b56636b94ea8

688 as geometric shapes

Circle

Radius = n
Diameter 1376
Circumference 4322.8314913396
Area 1487054.0330208

Sphere

Radius = n
Volume 1364124232.9578
Surface area 5948216.1320832
Circumference 4322.8314913396

Square

Length = n
Perimeter 2752
Area 473344
Diagonal 972.97893091269

Cube

Length = n
Surface area 2840064
Volume 325660672
Space diagonal 1191.6509556074

Equilateral Triangle

Length = n
Perimeter 2064
Area 204963.96436447
Altitude 595.82547780369

Triangular Pyramid

Length = n
Surface area 204963.96436447
Volume 38379478.256161
Height 324.32631030423