81907880 (number)

81907880 is an even 8-digits composite number following 81907879 and preceding 81907881. In scientific notation, it is written as 8.1907880 × 10^7. The sum of its digits is 41. It has a total of 6 prime factors and 32 positive divisors. There are 32717376 positive integers (up to 81907880) that are relatively prime to 81907880.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 8.1907880 × 10^7
Engineering notation 8.1907880 × 10^6

Prime Factorization of 81907880

Prime Factorization 2 × 2 × 2 × 5 × 1439 × 1423

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 6
Total number of prime factors
rad Radical 20476970
Product of the distinct prime numbers

The prime factorization of 81907880 is 2 × 2 × 2 × 5 × 1439 × 1423. Since it has a total of 6 prime factors.

Most popular turbo-numbers

8, 9, 74, 70, 351, 538, 9565, 3279, 84671, 85748, 308122, 391849, 595563, 5874770, 40529237, 93109806, 948452950, 383200206, 1968313395, 9243790234

Basic calculations (n = 81907880)

Multiplication

n×y
n×2 163815760
n×3 245723640
n×4 327631520
n×5 409539400

Division

n÷y
n÷2 40953940
n÷3 27302626.666667
n÷3 20476970
n÷5 16381576

Exponentiation

ny
n2 6708900806094400
n3 5.4951184215748E+23
n4 4.5009350026014E+31
n5 3.6866204408088E+39

Nth Root

y√n
2√n 9050.297232688
3√n 434.28539914731
4√n 95.1330501597
5√n 38.252967991767

Divisors of 81907880

1, 2, 4, 5, 8, 10, 20, 40, 1423, 1439, 2846, 2878, 5692, 5756, 7115, 7195, 11384, 11512, 14230, 14390, 28460, 28780, 56920, 57560, 2047697, 4095394, 8190788, 10238485, 16381576, 20476970, 40953940, 81907880

32 divisors

τ Total Divisors 32
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81907879
Sum of the proper positive divisors of n
A Arithmetic Mean 0.03125
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 32
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81907880 can be divided by 32 positive divisors. The sum of these divisors (counting 81907880) is 1, the average is 0.03125.

Base conversion 81907880

Base System Value
2 Binary 100111000011101000010101000
3 Ternary 12201010100111012
4 Quaternary 10320131002220
5 Quinary 131432023010
6 Senary 12043323052
8 Octal 470350250
10 Decimal 81907880
12 Duodecimal 23520488
16 Hexadecimal 4e1d0a8
20 Vigesimal 15bi9e0
36 Base36 1crkiw

Cryptographic Hash Functions

md5 cbf64314df54087f4df1d024ef66a2aa
sha1 72788477e1174690173d9464a6808cdfc8bf9870
sha256 84fcce2b764fc32525e23f9697cdc54b4e252283e693ee2d534d2482c4f4ea49
sha512 391792f187acbef8631d55c1b0a8ad05f6907b3af609b22fb5162afc94659d234b82b7cf8c11b8b8b942f3224a4f558c2566201218d5833caf744544a66bbebd
ripemd-160 d65996ab2cdfaf937085beb85593d006f8eaf43f

81907880 as geometric shapes

Circle

Radius = n
Diameter 163815760
Circumference 514642388.15823
Area 2.1076633486089E+16

Sphere

Radius = n
Volume 2.3017898218434E+24
Surface area 8.4306533944355E+16
Circumference 514642388.15823

Square

Length = n
Perimeter 327631520
Area 6708900806094400
Diagonal 115835234.76123

Cube

Length = n
Surface area 40253404836566400
Volume 5.4951184215748E+23
Space diagonal 141868609.70025

Equilateral Triangle

Length = n
Perimeter 245723640
Area 2.9050392647738E+15
Altitude 70934304.850127

Triangular Pyramid

Length = n
Surface area 2.9050392647738E+15
Volume 6.4760591655311E+22
Height 38611744.920409