81904920 (number)

81904920 is an even 8-digits composite number following 81904919 and preceding 81904921. In scientific notation, it is written as 8.1904920 × 10^7. The sum of its digits is 33. It has a total of 7 prime factors and 64 positive divisors. There are 21593088 positive integers (up to 81904920) that are relatively prime to 81904920.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 8.1904920 × 10^7
Engineering notation 8.1904920 × 10^6

Prime Factorization of 81904920

Prime Factorization 2 × 2 × 2 × 5 × 3 × 89 × 7669

Composite number
ω Distinct Factors 5
Total number of distinct prime factors
Ω Total Factors 7
Total number of prime factors
rad Radical 20476230
Product of the distinct prime numbers

The prime factorization of 81904920 is 2 × 2 × 2 × 5 × 3 × 89 × 7669. Since it has a total of 7 prime factors.

Most popular turbo-numbers

4, 5, 71, 82, 513, 81, 2755, 500, 75538, 82152, 914384, 644579, 1419528, 9196785, 5344394, 29134649, 344543108, 937726148, 638714292, 5815494428

Basic calculations (n = 81904920)

Multiplication

n×y
n×2 163809840
n×3 245714760
n×4 327619680
n×5 409524600

Division

n÷y
n÷2 40952460
n÷3 27301640
n÷3 20476230
n÷5 16380984

Exponentiation

ny
n2 6708415920206400
n3 5.4945226927123E+23
n4 4.5002844158479E+31
n5 3.6859543505727E+39

Nth Root

y√n
2√n 9050.1337006698
3√n 434.28016765934
4√n 95.132190664726
5√n 38.252691509401

Divisors of 81904920

1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 89, 120, 178, 267, 356, 445, 534, 712, 890, 1068, 1335, 1780, 2136, 2670, 3560, 5340, 7669, 10680, 15338, 23007, 30676, 38345, 46014, 61352, 76690, 92028, 115035, 153380, 184056, 230070, 306760, 460140, 682541, 920280, 1365082, 2047623, 2730164, 3412705, 4095246, 5460328, 6825410, 8190492, 10238115, 13650820, 16380984, 20476230, 27301640, 40952460, 81904920

64 divisors

τ Total Divisors 64
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81904919
Sum of the proper positive divisors of n
A Arithmetic Mean 0.015625
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 64
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81904920 can be divided by 64 positive divisors. The sum of these divisors (counting 81904920) is 1, the average is 0.015625.

Base conversion 81904920

Base System Value
2 Binary 100111000011100010100011000
3 Ternary 12201010012102120
4 Quaternary 10320130110120
5 Quinary 131431424140
6 Senary 12043301240
8 Octal 470342430
10 Decimal 81904920
12 Duodecimal 2351a820
16 Hexadecimal 4e1c518
20 Vigesimal 15bi260
36 Base36 1cri8o

Cryptographic Hash Functions

md5 7f8cc5329a5f4075e70c9271719f6d64
sha1 1ffd733e345b5597544e34ba161c20c782c68a4f
sha256 c3b60b2ad0acecbd7afc728ebde41b8fc37a5f344c5a35240accd28b862ff344
sha512 340b3cdff1528a240cd4c2f5414476323868e31cb1510690c7289eec78722ff4854ff1b8c1cb424230a107b2a742b2a5c88660e7f719bd40fb775492c9f68272
ripemd-160 18739df3378a7582251daa006c49c6aba1d42a8b

81904920 as geometric shapes

Circle

Radius = n
Diameter 163809840
Circumference 514623789.92972
Area 2.1075110172145E+16

Sphere

Radius = n
Volume 2.301540283521E+24
Surface area 8.4300440688581E+16
Circumference 514623789.92972

Square

Length = n
Perimeter 327619680
Area 6708415920206400
Diagonal 115831048.68908

Cube

Length = n
Surface area 40250495521238400
Volume 5.4945226927123E+23
Space diagonal 141863482.82986

Equilateral Triangle

Length = n
Perimeter 245714760
Area 2.9048293030254E+15
Altitude 70931741.414932

Triangular Pyramid

Length = n
Surface area 2.9048293030254E+15
Volume 6.4753570923337E+22
Height 38610349.563028