161898985 is an odd 9-digits composite number following 161898984
and preceding 161898986 . In scientific notation, it is written as 1.61898985 × 10^8.
The sum of its digits is 55. It has a total of 3 prime factors and 8 positive divisors.
There are 128742960 positive integers (up to 161898985) that are relatively prime to 161898985.
161898985 has 8 divisors, whose sum is 195443136
The reverse of 161898985 is 589898161
Previous prime number is 167
Is Prime? no
Number parity odd
Number length 9
Sum of Digits 55
Digital Root 1
Name
one hundred sixty-one million eight hundred ninety-eight thousand nine hundred eighty-five
Scientific notation
1.61898985 × 10^8
Engineering notation
1.61898985 × 10^6
Prime Factorization
5 × 167 × 193891
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
161898985
Product of the distinct prime numbers
The prime factorization of 161898985 is 5 × 167 × 193891.
Since it has a total of 3 prime factors.
3 , 6 , 6 , 81 , 879 , 110 , 1969 , 2928 , 94096 , 46840 , 314079 , 756934 , 6324899 , 4038354 , 2503261 , 23159904 , 180387070 , 396008871 , 2636235175 , 1972279806
n×2
323797970
n×3
485696955
n×4
647595940
n×5
809494925
n÷2
80949492.5
n÷3
53966328.333333
n÷3
40474746.25
n÷5
32379797
n2
26211281344030225
n3
4.2435798451479E+24
n4
6.8703126969591E+32
n5
1.1122966522703E+41
2 √n
12723.953198594
3 √n
545.02284784836
4 √n
112.8005017657
5 √n
43.837807494792
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
-161898984
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 161898985 can be divided by 8 positive divisors.
The sum of these divisors (counting 161898985) is 1, the average is 0.125.
Base
System
Value
2
Binary
1001101001100110000111101001
3
Ternary
102021122022122201
4
Quaternary
21221212013221
5
Quinary
312421231420
6
Senary
24022020201
8
Octal
1151460751
10
Decimal
161898985
12
Duodecimal
46277661
16
Hexadecimal
9a661e9
20
Vigesimal
2abh795
36
Base36
2oe221
md5
38831c05465e18a6aa88e8c489492785
sha1
313614b385606a5411aef608f09a75a35a8d3860
sha256
57e919b163a038c8113438a11d1b7265c4f55da1263353f03ea0c4ce41f01ed1
sha512
849a30fd5241c547344baa53896067f07235b9279a59c34f56161e2a05bb19420881cffd3de943e89c14b4385f4e67df6ff19ccf061a981e99307f9b08ed1a2a
ripemd-160
078fcb155a8cfac5685f2e2287b5e872fea18e65
Diameter
323797970
Circumference
1017241323.7993
Area
8.2345168911581E+16
Volume
1.7775465688585E+25
Surface area
3.2938067564632E+17
Circumference
1017241323.7993
Perimeter
647595940
Area
26211281344030225
Diagonal
228959740.32144
Surface area
157267688064181350
Volume
4.2435798451479E+24
Space diagonal
280417267.71383
Perimeter
485696955
Area
1.1349817754836E+16
Altitude
140208633.85692
Surface area
1.1349817754836E+16
Volume
5.0011068083511E+23
Height
76319913.440479