28721888 (number)

28721888 is an even 8-digits composite number following 28721887 and preceding 28721889. In scientific notation, it is written as 2.8721888 × 10^7. The sum of its digits is 44. It has a total of 9 prime factors and 72 positive divisors. There are 12859392 positive integers (up to 28721888) that are relatively prime to 28721888.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 2.8721888 × 10^7
Engineering notation 2.8721888 × 10^6

Prime Factorization of 28721888

Prime Factorization 2 × 2 × 2 × 2 × 2 × 13 × 13 × 47 × 113

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 9
Total number of prime factors
rad Radical 138086
Product of the distinct prime numbers

The prime factorization of 28721888 is 2 × 2 × 2 × 2 × 2 × 13 × 13 × 47 × 113. Since it has a total of 9 prime factors.

Most popular turbo-numbers

1, 2, 63, 74, 717, 562, 5231, 9148, 8110, 91886, 540665, 242899, 3939323, 8119591, 64687136, 75446664, 308202331, 110598000, 2660189759, 689362545

Basic calculations (n = 28721888)

Multiplication

n×y
n×2 57443776
n×3 86165664
n×4 114887552
n×5 143609440

Division

n÷y
n÷2 14360944
n÷3 9573962.6666667
n÷3 7180472
n÷5 5744377.6

Exponentiation

ny
n2 824946850284544
n3 2.3694031039825E+22
n4 6.8053730579439E+29
n5 1.9546316276848E+37

Nth Root

y√n
2√n 5359.2805487304
3√n 306.24640184583
4√n 73.207107228263
5√n 31.020057383351

Divisors of 28721888

1, 2, 4, 8, 13, 16, 26, 32, 47, 52, 94, 104, 113, 169, 188, 208, 226, 338, 376, 416, 452, 611, 676, 752, 904, 1222, 1352, 1469, 1504, 1808, 2444, 2704, 2938, 3616, 4888, 5311, 5408, 5876, 7943, 9776, 10622, 11752, 15886, 19097, 19552, 21244, 23504, 31772, 38194, 42488, 47008, 63544, 69043, 76388, 84976, 127088, 138086, 152776, 169952, 254176, 276172, 305552, 552344, 611104, 897559, 1104688, 1795118, 2209376, 3590236, 7180472, 14360944, 28721888

72 divisors

τ Total Divisors 72
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -28721887
Sum of the proper positive divisors of n
A Arithmetic Mean 0.013888888888889
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 72
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 28721888 can be divided by 72 positive divisors. The sum of these divisors (counting 28721888) is 1, the average is 0.013888888888889.

Base conversion 28721888

Base System Value
2 Binary 1101101100100001011100000
3 Ternary 2000001020000122
4 Quaternary 1231210023200
5 Quinary 24323100023
6 Senary 2503335412
8 Octal 155441340
10 Decimal 28721888
12 Duodecimal 9751568
16 Hexadecimal 1b642e0
20 Vigesimal 8ja4e8
36 Base36 h3ly8

Cryptographic Hash Functions

md5 3d0a2aae18a542ae6378d5bd4f262d9b
sha1 7175662332ab10b80efde6df70b0f9139aa345ab
sha256 3d2e2b3c5de95fd34876679a3c37a5ad6d75c0052704de61dce6b5fb50e3226a
sha512 ecb251d5829ec53f5bf03495ba6e283b55a51a92108e912a41faacbcf3d3f9aabbfc6b88b17a6b8ff51c198276d5b5970f0924af5d297c93becf31746475d34e
ripemd-160 b80dc4e4e7d2732865088bfecb2ee71a71236d83

28721888 as geometric shapes

Circle

Radius = n
Diameter 57443776
Circumference 180464944.67606
Area 2.591646964456E+15

Sphere

Radius = n
Volume 9.9249325131526E+22
Surface area 1.0366587857824E+16
Circumference 180464944.67606

Square

Length = n
Perimeter 114887552
Area 824946850284544
Diagonal 40618883.546561

Cube

Length = n
Surface area 4949681101707264
Volume 2.3694031039825E+22
Space diagonal 49747769.305303

Equilateral Triangle

Length = n
Perimeter 86165664
Area 3.5721246455919E+14
Altitude 24873884.652651

Triangular Pyramid

Length = n
Surface area 3.5721246455919E+14
Volume 2.7923683369842E+21
Height 13539627.848854