81507988 (number)

81507988 is an even 8-digits composite number following 81507987 and preceding 81507989. In scientific notation, it is written as 8.1507988 × 10^7. The sum of its digits is 46. It has a total of 4 prime factors and 12 positive divisors. There are 40483800 positive integers (up to 81507988) that are relatively prime to 81507988.

Interesting facts

Basic properties

Name

Name eighty-one million five hundred seven thousand nine hundred eighty-eight

Notation

Scientific notation 8.1507988 × 10^7
Engineering notation 8.1507988 × 10^6

Prime Factorization of 81507988

Prime Factorization 2 × 2 × 151 × 134947

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 40753994
Product of the distinct prime numbers

The prime factorization of 81507988 is 2 × 2 × 151 × 134947. Since it has a total of 4 prime factors.

Most popular turbo-numbers

6, 2, 75, 83, 646, 930, 2876, 8655, 43332, 95707, 914500, 938544, 1911165, 3627220, 8836533, 20335733, 363288422, 802651141, 6159590417, 2225505351

Basic calculations (n = 81507988)

Multiplication

n×y
n×2 163015976
n×3 244523964
n×4 326031952
n×5 407539940

Division

n÷y
n÷2 40753994
n÷3 27169329.333333
n÷3 20376997
n÷5 16301597.6

Exponentiation

ny
n2 6643552107808144
n3 5.415025654806E+23
n4 4.4136784609162E+31
n5 3.5975005102822E+39

Nth Root

y√n
2√n 9028.1774461959
3√n 433.57748739341
4√n 95.016721929331
5√n 38.215542979422

Divisors of 81507988

1, 2, 4, 151, 302, 604, 134947, 269894, 539788, 20376997, 40753994, 81507988

12 divisors

τ Total Divisors 12
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81507987
Sum of the proper positive divisors of n
A Arithmetic Mean 0.083333333333333
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 12
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81507988 can be divided by 12 positive divisors. The sum of these divisors (counting 81507988) is 1, the average is 0.083333333333333.

Base conversion 81507988

Base System Value
2 Binary 100110110111011011010010100
3 Ternary 12200101000221101
4 Quaternary 10312323122110
5 Quinary 131331223423
6 Senary 12030555444
8 Octal 466733224
10 Decimal 81507988
12 Duodecimal 23368b84
16 Hexadecimal 4dbb694
20 Vigesimal 15989j8
36 Base36 1cizys

Cryptographic Hash Functions

md5 76dbce4eb45d94e996b2fd9a9d2f787e
sha1 a47ac63e3272922e215f59ac58b3ca56a4c76c6d
sha256 363314978db9d9b3c085d0fcb813c6734ad615a1afe334ee13303639228ca1c4
sha512 990a03859981122a5d86ca72e22ce94e9346f684268417b49f5a53c3bf000217af9de983fef8e3196619e862216b10dff0f9ca0454279e55d2e534d8345cb6a7
ripemd-160 dba636708a2bed660c47be9d13d9c802799d4bc5

81507988 as geometric shapes

Circle

Radius = n
Diameter 163015976
Circumference 512129792.61937
Area 2.0871334495631E+16

Sphere

Radius = n
Volume 2.2682406421518E+24
Surface area 8.3485337982524E+16
Circumference 512129792.61937

Square

Length = n
Perimeter 326031952
Area 6643552107808144
Diagonal 115269702.07134

Cube

Length = n
Surface area 39861312646848864
Volume 5.415025654806E+23
Space diagonal 141175976.43871

Equilateral Triangle

Length = n
Perimeter 244523964
Area 2.8767424483638E+15
Altitude 70587988.219357

Triangular Pyramid

Length = n
Surface area 2.8767424483638E+15
Volume 6.3816689346874E+22
Height 38423234.023781