Number
-642
- Negative
- Even
- 3 digits
-642 is an even 3-digit integer and the negative of 642. It has 8 divisors and a digital root of 3.
Number properties
ParityEvendivisible by 2
SignNegative
Absolute value642
Digit count3
Digit sum12
Digital root3repeated digit sum
PalindromicNoreads differently backwards
Factors & divisors
Prime factorisation−1 × 2 × 3 × 107
Distinct prime factors32, 3, 107
Number of divisors8
Sum of divisors σ(n)1,296
SquarefreeYesno repeated prime factor
All divisors1, 2, 3, 6, 107, 214, 321, 6428 in total
Arithmetic
Representations
Decimal-642
Binary101000001010 bits
Octal1202
Hexadecimal282
Base 36HU
In wordsminus six hundred and forty-two
Ordinalminus six hundred and forty-second
Scientific notation-6.42 × 10^2
Engineering notation-642
Powers & multiples
-642 to the power 2412,164
-642 to the power 3-264,609,288
-642 to the power 4169,879,162,896
-642 to the power 5-109,062,422,579,232
First ten multiples-642, -1,284, -1,926, -2,568, -3,210, -3,852, -4,494, -5,136, -5,778, -6,420
Powers of twoBetween 2^9 (512) and 2^10 (1,024)
Divisibility tests
Divisible by 2Yes
Divisible by 3Yes
Divisible by 4No, remainder 2
Divisible by 5No, remainder 2
Divisible by 6Yes
Divisible by 7No, remainder 5
Divisible by 8No, remainder 2
Divisible by 9No, remainder 3
Divisible by 10No, remainder 2
Divisible by 11No, remainder 4
Divisible by 12No, remainder 6
Divisible by 100No, remainder 42
As a percentage & fraction
As a percentage-64,200%
-642% as a decimal-6.42
-642% of 100-642
-642% of 1,000-6,420
As a fraction of 100-642/100
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