1991388 is an even 7-digits composite number following 1991387
and preceding 1991389 . In scientific notation, it is written as 1.991388 × 10^6.
The sum of its digits is 39. It has a total of 5 prime factors and 24 positive divisors.
There are 561600 positive integers (up to 1991388) that are relatively prime to 1991388.
1991388 has 24 divisors, whose sum is 3698464
The reverse of 1991388 is 8831991
Previous prime number is 151
Is Prime? no
Number parity even
Number length 7
Sum of Digits 39
Digital Root 3
Name
one million nine hundred ninety-one thousand three hundred eighty-eight
Scientific notation
1.991388 × 10^6
Engineering notation
1.991388 × 10^6
Prime Factorization
2 × 2 × 21 × 151 × 157
Composite number
ω
Distinct Factors
4
Total number of distinct prime factors
Ω
Total Factors
5
Total number of prime factors
rad
Radical
995694
Product of the distinct prime numbers
The prime factorization of 1991388 is 2 × 2 × 21 × 151 × 157.
Since it has a total of 5 prime factors.
4 , 1 , 80 , 59 , 102 , 179 , 7659 , 9762 , 93907 , 24848 , 753873 , 710661 , 1882560 , 3846834 , 17180074 , 79825898 , 954207600 , 466365180 , 8854618795 , 1215270937
n×2
3982776
n×3
5974164
n×4
7965552
n×5
9956940
n÷2
995694
n÷3
663796
n÷3
497847
n÷5
398277.6
n2
3965626166544
n3
7897100360541723072
n4
1.5726190892778E+25
n5
3.1316947829588E+31
2 √n
1411.1654757682
3 √n
125.81100413209
4 √n
37.565482504131
5 √n
18.189936256372
1 , 2 , 4 , 21 , 42 , 84 , 151 , 157 , 302 , 314 , 604 , 628 , 3171 , 3297 , 6342 , 6594 , 12684 , 13188 , 23707 , 47414 , 94828 , 497847 , 995694 , 1991388
24 divisors
τ
Total Divisors
24
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-1991387
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.041666666666667
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
24
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 1991388 can be divided by 24 positive divisors.
The sum of these divisors (counting 1991388) is 1, the average is 0.041666666666667.
Base
System
Value
2
Binary
111100110001011011100
3
Ternary
10202011200010
4
Quaternary
13212023130
5
Quinary
1002211023
6
Senary
110403220
8
Octal
7461334
10
Decimal
1991388
12
Duodecimal
800510
16
Hexadecimal
1e62dc
20
Vigesimal
c8i98
36
Base36
16okc
md5
c4de6c54703da62a4fda310782b494ce
sha1
c301085f184ac4c35f76414edb4c87c9eca162eb
sha256
797a244cbe7e508877274fcfd12e93499ac21ef6175befd75d31f8e42748476c
sha512
f3a185fcafd1a68b3d16868aa0cb802becb81d4d6cbf129e9c0f2e0f39fe229d6fb25043d6e93ae99d478a677986089b98465fa6e82744d33e72ff96b4d31d8e
ripemd-160
a6ad400a59cff492fcf2a2bff1ef572b58d3ec82
Diameter
3982776
Circumference
12512259.822494
Area
12458382031698
Volume
3.3079296636452E+19
Surface area
49833528126792
Circumference
12512259.822494
Perimeter
7965552
Area
3965626166544
Diagonal
2816247.917547
Surface area
23793756999264
Volume
7897100360541723072
Space diagonal
3449185.193583
Perimeter
5974164
Area
1717166501069.7
Altitude
1724592.5967915
Surface area
1717166501069.7
Volume
9.3068220277496E+17
Height
938749.30584901