28749991 is an odd 8-digits composite number following 28749990
and preceding 28749992 . In scientific notation, it is written as 2.8749991 × 10^7.
The sum of its digits is 49. It has a total of 3 prime factors and 8 positive divisors.
There are 27668928 positive integers (up to 28749991) that are relatively prime to 28749991.
28749991 has 8 divisors, whose sum is 29837520
The reverse of 28749991 is 19994782
Previous prime number is 347
Is Prime? no
Number parity odd
Number length 8
Sum of Digits 49
Digital Root 4
Name
twenty-eight million seven hundred forty-nine thousand nine hundred ninety-one
Scientific notation
2.8749991 × 10^7
Engineering notation
2.8749991 × 10^6
Prime Factorization
29 × 347 × 2857
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
28749991
Product of the distinct prime numbers
The prime factorization of 28749991 is 29 × 347 × 2857.
Since it has a total of 3 prime factors.
1 , 3 , 51 , 41 , 346 , 428 , 8756 , 4943 , 72739 , 62741 , 185447 , 706201 , 5547851 , 5726526 , 61972251 , 66759256 , 305277721 , 256895202 , 9557070072 , 1377454472
n×2
57499982
n×3
86249973
n×4
114999964
n×5
143749955
n÷2
14374995.5
n÷3
9583330.3333333
n÷3
7187497.75
n÷5
5749998.2
n2
826561982500081
n3
2.3763649557819E+22
n4
6.8320471091446E+29
n5
1.9642129289948E+37
2 √n
5361.9018081274
3 √n
306.34625179485
4 √n
73.225008078712
5 √n
31.026125338799
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
-28749990
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 28749991 can be divided by 8 positive divisors.
The sum of these divisors (counting 28749991) is 1, the average is 0.125.
Base
System
Value
2
Binary
1101101101011000010100111
3
Ternary
2000002122120111
4
Quaternary
1231223002213
5
Quinary
24324444431
6
Senary
2504113451
8
Octal
155530247
10
Decimal
28749991
12
Duodecimal
9765887
16
Hexadecimal
1b6b0a7
20
Vigesimal
8jdejb
36
Base36
h47mv
md5
4a2637ae945bacf61395443a6fa1ac92
sha1
f39e65b3fae7d1adff816fa758ef7da7279831b0
sha256
e497207156a96aa049ba5a0df9492f9692188df7c19ea44d4e7e8fd324aa8848
sha512
9d8b7f947ad03807fd8ecd60bbfba3431fc3277012624c8f2706c19da68ccb4bb1cda72bfebecec7e5bede8c4cb9f36a0df3cf2294a14a6a221879c97b42af0d
ripemd-160
d0f6d3e423564e593133405755154e24adde7415
Diameter
57499982
Circumference
180641521.03275
Area
2.5967210519589E+15
Volume
9.9540942497771E+22
Surface area
1.0386884207835E+16
Circumference
180641521.03275
Perimeter
114999964
Area
826561982500081
Diagonal
40658627.190304
Surface area
4959371895000486
Volume
2.3763649557819E+22
Space diagonal
49796445.129148
Perimeter
86249973
Area
3.5791183732375E+14
Altitude
24898222.564574
Surface area
3.5791183732375E+14
Volume
2.8005729580125E+21
Height
13552875.730101