81409940 (number)

81409940 is an even 8-digits composite number following 81409939 and preceding 81409941. In scientific notation, it is written as 8.1409940 × 10^7. The sum of its digits is 35. It has a total of 5 prime factors and 24 positive divisors. There are 30648320 positive integers (up to 81409940) that are relatively prime to 81409940.

Interesting facts

Basic properties

Name

Name eighty-one million four hundred nine thousand nine hundred forty

Notation

Scientific notation 8.1409940 × 10^7
Engineering notation 8.1409940 × 10^6

Prime Factorization of 81409940

Prime Factorization 2 × 2 × 17 × 5 × 239441

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 40704970
Product of the distinct prime numbers

The prime factorization of 81409940 is 2 × 2 × 17 × 5 × 239441. Since it has a total of 5 prime factors.

Most popular turbo-numbers

2, 10, 40, 45, 720, 614, 8852, 1281, 73013, 41847, 820395, 246012, 2033375, 8851140, 74788822, 61124448, 270976917, 358688003, 3245909093, 4345294492

Basic calculations (n = 81409940)

Multiplication

n×y
n×2 162819880
n×3 244229820
n×4 325639760
n×5 407049700

Division

n÷y
n÷2 40704970
n÷3 27136646.666667
n÷3 20352485
n÷5 16281988

Exponentiation

ny
n2 6627578330803600
n3 5.3955075425602E+23
n4 4.3924794530937E+31
n5 3.5759148872759E+39

Nth Root

y√n
2√n 9022.745701836
3√n 433.4035638965
4√n 94.988134531825
5√n 38.206344465568

Divisors of 81409940

1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 239441, 478882, 957764, 1197205, 2394410, 4070497, 4788820, 8140994, 16281988, 20352485, 40704970, 81409940

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 -81409939
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 81409940 can be divided by 24 positive divisors. The sum of these divisors (counting 81409940) is 1, the average is 0.041666666666667.

Base conversion 81409940

Base System Value
2 Binary 100110110100011011110010100
3 Ternary 12200012001102222
4 Quaternary 10312203132110
5 Quinary 131320104230
6 Senary 12024521512
8 Octal 466433624
10 Decimal 81409940
12 Duodecimal 23320298
16 Hexadecimal 4da3794
20 Vigesimal 158g4h0
36 Base36 1cgwb8

Cryptographic Hash Functions

md5 a3333cb61fb14a51008640100158a9e2
sha1 fcde47f6a18943166d9a636f89b1d25188f43d18
sha256 0a3cb7dde7487e3cd7182d80fb8dd54596850f5ce7f859c2258e0913373c4c40
sha512 48136add4ec10f4729f25a5aba81554f2f1b2b65e421a339b9acb12a09914e354a8491a1401f161771a2f74ce4e29248ed18722cd1132200217a81df6fe3bdb6
ripemd-160 f9676b51ef7ff28e66e045ca6a41b43b9400f99e

81409940 as geometric shapes

Circle

Radius = n
Diameter 162819880
Circumference 511513738.86637
Area 2.0821151395143E+16

Sphere

Radius = n
Volume 2.2600649144127E+24
Surface area 8.3284605580574E+16
Circumference 511513738.86637

Square

Length = n
Perimeter 325639760
Area 6627578330803600
Diagonal 115131041.25998

Cube

Length = n
Surface area 39765469984821600
Volume 5.3955075425602E+23
Space diagonal 141006152.32113

Equilateral Triangle

Length = n
Perimeter 244229820
Area 2.8698256000236E+15
Altitude 70503076.160567

Triangular Pyramid

Length = n
Surface area 2.8698256000236E+15
Volume 6.3586666188125E+22
Height 38377013.753327