Recognised as Number
-490
- Negative
- Even
- 3 digits
-490 is an even 3-digit integer and the negative of 490. It has 12 divisors and a digital root of 4.
Number properties
ParityEvendivisible by 2
SignNegative
Absolute value490
Digit count3
Digit sum13
Digit product0zero, because one of the digits is zero
Multiplicative persistence1times the digit product can be taken before one digit is left
Digital root4repeated digit sum
PalindromicNoreads differently backwards
Factors & divisors
Prime factorisation−1 × 2 × 5 × 7^2
Distinct prime factors32, 5, 7
Number of divisors12
Sum of divisors σ(n)1,026
SquarefreeNohas a repeated prime factor
All divisors1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 49012 in total
Arithmetic
Representations
Decimal-490
Binary1111010109 bits
Octal752
Hexadecimal1EA
Base 36DM
In wordsminus four hundred and ninety
Ordinalminus four hundred and ninetieth
Scientific notation-4.9 × 10^2
Engineering notation-490
In other bases
Ternary200011base 3; the most digit-efficient integer base after e: 6 digits
Quinary3430base 5; one hand: 4 digits
Septenary1300base 7: 4 digits
Nonary604base 9; each digit is two ternary digits: 3 digits
Duodecimal34abase 12; divides by 2, 3, 4 and 6, which is why eggs and inches come in twelves: 3 digits
Vigesimal14abase 20; hands and feet, and the Mayan and Yoruba systems: 3 digits
Sexagesimal8:10base 60; Babylonian, and still how an hour and a circle are divided: 2 digits
Balanced ternaryT1000TTdigits −1, 0 and +1 written T, 0 and 1; negation is swapping T and 1, so no sign is needed
Negabinary1001101010base −2; place values alternate 1, −2, 4, −8, so every integer has exactly one form without a sign
Bit-level
1111111000010110
Bit length9 bitsto write the magnitude
Set bits6the population count, or Hamming weight
Zero bits3within that length
Bit parityeven6 set bits, so even; not the same as the number itself being even
Highest set bitbit 8worth 256
Lowest set bitbit 11 trailing zero
Power of twoNo
Bytes201 ea
Gray code100011111n XOR (n >> 1); successive values differ in exactly one bit
At each machine width
16-bit1111111000010110two's complement
32-bit11111111111111111111111000010110two's complement
64-bit1111111111111111111111111111111111111111111111111111111000010110two's complement
One's complement0000000111101001at 16 bits, every bit flipped
Bits reversed0110100001111111at 16 bits
Rotated left by 11111110000101101at 16 bits, wrapping
Shifted left by 1-1111010100= -980, no wrap
Shifted right by 1-11110101= -245, discarding the low bit
These bits as a double2.42092166 × 10^-321≈IEEE-754 binary64 reinterpretation of the same 64 bits (subnormal)
Powers & multiples
-490 to the power 2240,100
-490 to the power 3-117,649,000
-490 to the power 457,648,010,000
-490 to the power 5-28,247,524,900,000
First ten multiples-490, -980, -1,470, -1,960, -2,450, -2,940, -3,430, -3,920, -4,410, -4,900
Powers of twoBetween 2^8 (256) and 2^9 (512)
Divisibility tests
Divisible by 2Yes
Divisible by 3No, remainder 1
Divisible by 4No, remainder 2
Divisible by 5Yes
Divisible by 6No, remainder 4
Divisible by 7Yes
Divisible by 8No, remainder 2
Divisible by 9No, remainder 4
Divisible by 10Yes
Divisible by 11No, remainder 6
Divisible by 12No, remainder 10
Divisible by 100No, remainder 90
As a percentage & fraction
As a percentage-49,000%
-490% as a decimal-4.9
-490% of 100-490
-490% of 1,000-4,900
As a fraction of 100-490/100
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