15661988 (number)

15661988 is an even 8-digits composite number following 15661987 and preceding 15661989. In scientific notation, it is written as 1.5661988 × 10^7. The sum of its digits is 44. It has a total of 4 prime factors and 12 positive divisors. There are 7490472 positive integers (up to 15661988) that are relatively prime to 15661988.

Interesting facts

Basic properties

Name

Name fifteen million six hundred sixty-one thousand nine hundred eighty-eight

Notation

Scientific notation 1.5661988 × 10^7
Engineering notation 1.5661988 × 10^6

Prime Factorization of 15661988

Prime Factorization 2 × 2 × 23 × 170239

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 7830994
Product of the distinct prime numbers

The prime factorization of 15661988 is 2 × 2 × 23 × 170239. Since it has a total of 4 prime factors.

Most popular turbo-numbers

8, 2, 43, 16, 775, 220, 770, 6175, 87159, 11046, 502292, 120636, 6604015, 3736783, 59172124, 29172240, 433060230, 716189950, 635097920, 6457778381

Basic calculations (n = 15661988)

Multiplication

n×y
n×2 31323976
n×3 46985964
n×4 62647952
n×5 78309940

Division

n÷y
n÷2 7830994
n÷3 5220662.6666667
n÷3 3915497
n÷5 3132397.6

Exponentiation

ny
n2 245297868112144
n3 3.841852266798E+21
n4 6.0171044100363E+28
n5 9.4239817064735E+35

Nth Root

y√n
2√n 3957.5229626624
3√n 250.19711387697
4√n 62.90884645789
5√n 27.477004026272

Divisors of 15661988

1, 2, 4, 23, 46, 92, 170239, 340478, 680956, 3915497, 7830994, 15661988

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 -15661987
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 15661988 can be divided by 12 positive divisors. The sum of these divisors (counting 15661988) is 1, the average is 0.083333333333333.

Base conversion 15661988

Base System Value
2 Binary 111011101111101110100100
3 Ternary 1002110201012122
4 Quaternary 323233232210
5 Quinary 13002140423
6 Senary 1315405112
8 Octal 73575644
10 Decimal 15661988
12 Duodecimal 52b3798
16 Hexadecimal eefba4
20 Vigesimal 4hhej8
36 Base36 9bov8

Cryptographic Hash Functions

md5 980f40bfb9396ea900634e280bb2d460
sha1 6edb25267e158bac1f83a3e086362b3e584b6efa
sha256 a0f4832c413f6d3afb093a25473158df34723fdbe291601164c7f9dadbd11b95
sha512 40c0941caeeeb19f1528b8e39f0ef9bddb6406197371b51b4d96b52cd3b555f48ca0b31de382e8c5a6426ec7eca7684ea7e4bca8595f55d93499f07395fe4cb0
ripemd-160 b2f3ef8cac82be02def7e0773f1a7c4ca0829a25

15661988 as geometric shapes

Circle

Radius = n
Diameter 31323976
Circumference 98407172.882823
Area 7.7062598040235E+14

Sphere

Radius = n
Volume 1.60927131434E+22
Surface area 3.0825039216094E+15
Circumference 98407172.882823

Square

Length = n
Perimeter 62647952
Area 245297868112144
Diagonal 22149395.843325

Cube

Length = n
Surface area 1471787208672864
Volume 3.841852266798E+21
Space diagonal 27127358.963534

Equilateral Triangle

Length = n
Perimeter 46985964
Area 1.0621709263964E+14
Altitude 13563679.481767

Triangular Pyramid

Length = n
Surface area 1.0621709263964E+14
Volume 4.5276663169496E+20
Height 7383131.9477749