# 387 (number)

387 is an odd three-digits composite number following 386 and preceding 388. In scientific notation, it is written as 3.87 × 102. The sum of its digits is 18. It has a total of 3 prime factors and 6 positive divisors. There are 252 positive integers (up to 387) that are relatively prime to 387.

## Basic properties

• Is Prime? no
• Number parity odd
• Number length 3
• Sum of Digits 18
• Digital Root 9

## Name

Name three hundred eighty-seven

## Notation

Scientific notation 3.87 × 102 387 × 100

## Prime Factorization of 387

Prime Factorization 32 × 43

Composite number
Distinct Factors Total Factors Radical ω 2 Total number of distinct prime factors Ω 3 Total number of prime factors rad 129 Product of the distinct prime numbers λ -1 Returns the parity of Ω(n), such that λ(n) = (-1)Ω(n) μ 0 Returns: 1, if n has an even number of prime factors (and is square free) −1, if n has an odd number of prime factors (and is square free) 0, if n has a squared prime factor Λ 0 Returns log(p) if n is a power pk of any prime p (for any k >= 1), else returns 0

The prime factorization of 387 is 32 × 43. Since it has a total of 3 prime factors, 387 is a composite number.

## Divisors of 387

1, 3, 9, 43, 129, 387

6 divisors

 Even divisors 0 6 3 3
Total Divisors Sum of Divisors Aliquot Sum τ 6 Total number of the positive divisors of n σ 572 Sum of all the positive divisors of n s 185 Sum of the proper positive divisors of n A 95.333 Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n)) G 19.6723 Returns the nth root of the product of n divisors H 4.05944 Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 387 can be divided by 6 positive divisors (out of which none is even, and 6 are odd). The sum of these divisors (counting 387) is 572, the average is 95.333.

## Other Arithmetic Functions (n = 387)

1 φ(n) n
Euler Totient Carmichael Lambda Prime Pi φ 252 Total number of positive integers not greater than n that are coprime to n λ 42 Smallest positive number such that aλ(n) ≡ 1 (mod n) for all a coprime to n π ≈ 78 Total number of primes less than or equal to n r2 0 The number of ways n can be represented as the sum of 2 squares

There are 252 positive integers (less than 387) that are coprime with 387. And there are approximately 78 prime numbers less than or equal to 387.

## Divisibility of 387

m n mod m
2 1
3 0
4 3
5 2
6 3
7 2
8 3
9 0

The number 387 is divisible by 3 and 9.

## Classification of 387

• Deficient

### Expressible via specific sums

• Polite
• Non hypotenuse

## Base conversion 387

Base System Value
2 Binary 110000011
3 Ternary 112100
4 Quaternary 12003
5 Quinary 3022
6 Senary 1443
8 Octal 603
10 Decimal 387
12 Duodecimal 283
20 Vigesimal j7
36 Base36 ar

## Basic calculations (n = 387)

### Multiplication

n×y
 n×2 774 1161 1548 1935

### Division

n÷y
 n÷2 193.5 129 96.75 77.4

### Exponentiation

ny
 n2 149769 57960603 22430753361 8680701550707

### Nth Root

y√n
 2√n 19.6723 7.28736 4.43535 3.29262

## 387 as geometric shapes

### Circle

 Diameter 774 2431.59 470513

### Sphere

 Volume 2.42785e+08 1.88205e+06 2431.59

### Square

Length = n
 Perimeter 1548 149769 547.301

### Cube

Length = n
 Surface area 898614 5.79606e+07 670.304

### Equilateral Triangle

Length = n
 Perimeter 1161 64851.9 335.152

### Triangular Pyramid

Length = n
 Surface area 259408 6.83072e+06 315.984

## Cryptographic Hash Functions

md5 8efb100a295c0c690931222ff4467bb8 f7e19157e9c4e0b9bf77b16588e3961fe4b0e2d9 25dac95b8f595046bc435139636b0e2f1ff6e0ea31a54f3c19e7e726fb98738b ef27cff1dcce800d46b29b5ce415b8fa6f1c5df3ffd7471fc0c691281b712eb0f689406fb1bf7d25982880e0141dedf7d10a977e1ff1a957a81582629134a9c6 7e2644a225a44af9135aee9b0022f7e2e2718779
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