81878488 is an even 8-digits composite number following 81878487
and preceding 81878489 . In scientific notation, it is written as 8.1878488 × 10^7.
The sum of its digits is 52. It has a total of 4 prime factors and 8 positive divisors.
There are 40939240 positive integers (up to 81878488) that are relatively prime to 81878488.
81878488 has 8 divisors, whose sum is 153522180
The reverse of 81878488 is 88487818
Previous prime number is 2
Is Prime? no
Number parity even
Number length 8
Sum of Digits 52
Digital Root 7
Name
eighty-one million eight hundred seventy-eight thousand four hundred eighty-eight
Scientific notation
8.1878488 × 10^7
Engineering notation
8.1878488 × 10^6
Prime Factorization
2 × 2 × 2 × 10234811
Composite number
ω
Distinct Factors
2
Total number of distinct prime factors
Ω
Total Factors
4
Total number of prime factors
rad
Radical
20469622
Product of the distinct prime numbers
The prime factorization of 81878488 is 2 × 2 × 2 × 10234811.
Since it has a total of 4 prime factors.
10 , 7 , 76 , 70 , 235 , 552 , 5998 , 7923 , 92172 , 39401 , 782265 , 615294 , 8085043 , 31173 , 82356166 , 87425874 , 443929077 , 247343756 , 5142292940 , 4179754182
n×2
163756976
n×3
245635464
n×4
327513952
n×5
409392440
n÷2
40939244
n÷3
27292829.333333
n÷3
20469622
n÷5
16375697.6
n2
6704086797166144
n3
5.4892049037273E+23
n4
4.4944779783937E+31
n5
3.6800106122018E+39
2 √n
9048.6732729169
3 √n
434.23344629665
4 √n
95.124514573883
5 √n
38.250222242144
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
-81878487
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 81878488 can be divided by 8 positive divisors.
The sum of these divisors (counting 81878488) is 1, the average is 0.125.
Base
System
Value
2
Binary
100111000010101110111011000
3
Ternary
12201001212011121
4
Quaternary
10320111313120
5
Quinary
131430102423
6
Senary
12042535024
8
Octal
470256730
10
Decimal
81878488
12
Duodecimal
23507474
16
Hexadecimal
4e15dd8
20
Vigesimal
15beg48
36
Base36
1cqxug
md5
023d64115882274ea72cdd6f7d8e74ec
sha1
af20fb9145c97179697859e193c8948aacb7119e
sha256
e07e3b764dd174f763e9cb4a2cb3176843db7f4252d9aa76d1571be6ceb9c1e2
sha512
07cea359a39d18cbaaa33c2f5222ebf800d438001fe27a82a8acc1c49098d24c071527cea49d205e8d7607dfd55ad51e8b7d2d5c3dc6de7351876d2d2ae65700
ripemd-160
a1f103f3aa7eeadff0fb252f30135f25cadd0f41
Diameter
163756976
Circumference
514457712.77568
Area
2.1061509831005E+16
Volume
2.2993127732798E+24
Surface area
8.4246039324022E+16
Circumference
514457712.77568
Perimeter
327513952
Area
6704086797166144
Diagonal
115793668.1962
Surface area
40224520782996864
Volume
5.4892049037273E+23
Space diagonal
141817701.26292
Perimeter
245635464
Area
2.9029547377609E+15
Altitude
70908850.631459
Surface area
2.9029547377609E+15
Volume
6.4690900179133E+22
Height
38597889.398734