81998988 (number)

81998988 is an even 8-digits composite number following 81998987 and preceding 81998989. In scientific notation, it is written as 8.1998988 × 10^7. The sum of its digits is 60. It has a total of 5 prime factors and 24 positive divisors. There are 27217680 positive integers (up to 81998988) that are relatively prime to 81998988.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 8.1998988 × 10^7
Engineering notation 8.1998988 × 10^6

Prime Factorization of 81998988

Prime Factorization 2 × 2 × 3 × 239 × 28591

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 40999494
Product of the distinct prime numbers

The prime factorization of 81998988 is 2 × 2 × 3 × 239 × 28591. Since it has a total of 5 prime factors.

Most popular turbo-numbers

4, 5, 24, 37, 255, 146, 3230, 88, 26322, 32156, 176580, 376386, 4164945, 4951730, 68206656, 8625017, 184396856, 436582234, 9227968051, 3205107737

Basic calculations (n = 81998988)

Multiplication

n×y
n×2 163997976
n×3 245996964
n×4 327995952
n×5 409994940

Division

n÷y
n÷2 40999494
n÷3 27332996
n÷3 20499747
n÷5 16399797.6

Exponentiation

ny
n2 6723834033024144
n3 5.5134758618794E+23
n4 4.5209944103654E+31
n5 3.7071696640362E+39

Nth Root

y√n
2√n 9055.3292596128
3√n 434.44636132753
4√n 95.159493796535
5√n 38.261474137443

Divisors of 81998988

1, 2, 3, 4, 6, 12, 239, 478, 717, 956, 1434, 2868, 28591, 57182, 85773, 114364, 171546, 343092, 6833249, 13666498, 20499747, 27332996, 40999494, 81998988

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 -81998987
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 81998988 can be divided by 24 positive divisors. The sum of these divisors (counting 81998988) is 1, the average is 0.041666666666667.

Base conversion 81998988

Base System Value
2 Binary 100111000110011010010001100
3 Ternary 12201021222110120
4 Quaternary 10320303102030
5 Quinary 131442431423
6 Senary 12045304540
8 Octal 470632214
10 Decimal 81998988
12 Duodecimal 23565150
16 Hexadecimal 4e3348c
20 Vigesimal 15c9h98
36 Base36 1ctito

Cryptographic Hash Functions

md5 b26a04fc24a4a48bb47d5b06533d1a2c
sha1 e7799d68acc4f5d810f4d53a8a5d5757086841ef
sha256 ad42aa2240891f405dfe5909687c5b8c7dbc7ccdf540e92789cf07b11178c485
sha512 0e99c2c5f4e8e57e07c871c1f5632c2788adede7d6b78e47893c1074cf2b4e51162192d9978e1369429b675f75761b6a908aabf43353485a9af695e404aafe36
ripemd-160 546096f71906af532ed18d459cab8a6fb99a08db

81998988 as geometric shapes

Circle

Radius = n
Diameter 163997976
Circumference 515214836.6052
Area 2.1123547602106E+16

Sphere

Radius = n
Volume 2.3094793684567E+24
Surface area 8.4494190408423E+16
Circumference 515214836.6052

Square

Length = n
Perimeter 327995952
Area 6723834033024144
Diagonal 115964080.93047

Cube

Length = n
Surface area 40343004198144864
Volume 5.5134758618794E+23
Space diagonal 142026413.38523

Equilateral Triangle

Length = n
Perimeter 245996964
Area 2.9115055417146E+15
Altitude 71013206.692615

Triangular Pyramid

Length = n
Surface area 2.9115055417146E+15
Volume 6.4976936164054E+22
Height 38654693.64349