81978412 (number)

81978412 is an even 8-digits composite number following 81978411 and preceding 81978413. In scientific notation, it is written as 8.1978412 × 10^7. The sum of its digits is 40. It has a total of 3 prime factors and 6 positive divisors. There are 40989204 positive integers (up to 81978412) that are relatively prime to 81978412.

Interesting facts

Basic properties

Name

Name eighty-one million nine hundred seventy-eight thousand four hundred twelve

Notation

Scientific notation 8.1978412 × 10^7
Engineering notation 8.1978412 × 10^6

Prime Factorization of 81978412

Prime Factorization 2 × 2 × 20494603

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 3
Total number of prime factors
rad Radical 40989206
Product of the distinct prime numbers

The prime factorization of 81978412 is 2 × 2 × 20494603. Since it has a total of 3 prime factors.

Most popular turbo-numbers

5, 9, 51, 21, 815, 805, 4367, 4485, 19075, 80918, 820146, 975364, 9813382, 5905966, 66412045, 33751251, 858333987, 875507736, 7324804336, 5742511663

Basic calculations (n = 81978412)

Multiplication

n×y
n×2 163956824
n×3 245935236
n×4 327913648
n×5 409892060

Division

n÷y
n÷2 40989206
n÷3 27326137.333333
n÷3 20494603
n÷5 16395682.4

Exponentiation

ny
n2 6720460034041744
n3 5.5093264150021E+23
n4 4.5164583069152E+31
n5 3.7025207986512E+39

Nth Root

y√n
2√n 9054.1930617808
3√n 434.41001975652
4√n 95.153523643535
5√n 38.259553754905

Divisors of 81978412

1, 2, 4, 20494603, 40989206, 81978412

6 divisors

τ Total Divisors 6
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81978411
Sum of the proper positive divisors of n
A Arithmetic Mean 0.16666666666667
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 6
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81978412 can be divided by 6 positive divisors. The sum of these divisors (counting 81978412) is 1, the average is 0.16666666666667.

Base conversion 81978412

Base System Value
2 Binary 100111000101110010000101100
3 Ternary 12201020221020111
4 Quaternary 10320232100230
5 Quinary 131441302122
6 Senary 12045025404
8 Octal 470562054
10 Decimal 81978412
12 Duodecimal 23555264
16 Hexadecimal 4e2e42c
20 Vigesimal 15c760c
36 Base36 1ct2y4

Cryptographic Hash Functions

md5 c8fad163a95c0bf36e15906fc5e07534
sha1 df40d7b5a60a7e9fef4acbc533f3eb6bdcb26862
sha256 3d9e8fa2b7e0fffb02535c20dea2bf46aa9ad31be2c81ed0b2a7ce9974058cd0
sha512 12c5fc325ca1daf5541578f84fca4baf5e3b51830621baad8635a550c657ccda02cfae360464f52e099f6b25007f6045325676eb0843a564e237b60eea635731
ripemd-160 3e3114256e6d9a51d372e0b72271cb62e0d6eb41

81978412 as geometric shapes

Circle

Radius = n
Diameter 163956824
Circumference 515085553.78431
Area 2.1112947871689E+16

Sphere

Radius = n
Volume 2.3077412522132E+24
Surface area 8.4451791486757E+16
Circumference 515085553.78431

Square

Length = n
Perimeter 327913648
Area 6720460034041744
Diagonal 115934982.07221

Cube

Length = n
Surface area 40322760204250464
Volume 5.5093264150021E+23
Space diagonal 141990774.70781

Equilateral Triangle

Length = n
Perimeter 245935236
Area 2.9100445572991E+15
Altitude 70995387.353907

Triangular Pyramid

Length = n
Surface area 2.9100445572991E+15
Volume 6.4928034463636E+22
Height 38644994.02407