### constructor

Returns the constructor function for an object.

The return value is a reference to the function, not the name of the function:

=> For JavaScript numbers –> returns function Number() { [native code] }

=> For JavaScript strings –> returns function String() { [native code] }

=> For JavaScript booleans –> returns function Boolean() { [native code] }

#### Example

```
number = 1;
console.log(number.constructor);
//[Function: Number]
//in console.log you don't get { [native code] } part
```

### MAX_VALUE

Returns the largest number possible in JavaScript.

This static property has a value of 1.7976931348623157e+308.

Numbers larger than MAX_VALUE are represented as infinity.

Example

```
console.log(Number.MAX_VALUE);
// 1.7976931348623157e+308
```

MAX_VALUE is a static property of the JavaScript Number object. We can only use it as Number.MAX_VALUE.

Using x.MAX_VALUE, where x is a number or a Number object, will return undefined:

```
number = 1;
console.log(number.MAX_VALUE);
//undefined
```

### MIN_VALUE

Returns the smallest positive number possible in JavaScript.

This static property has a value of 5e-324.

Numbers smaller than this are converted to 0.

```
console.log(Number.MIN_VALUE);
//5e-324
```

MIN_VALUE is the value closest to 0. The most negative number is the negative MAX_NUMBER.

MIN_VALUE is a static property of the JavaScript Number object. You can only use it as Number.MIN_VALUE.

Using x.MIN_VALUE, where x is a number or a Number object, will return undefined:

```
number = 1;
console.log(number.MIN_VALUE);
//undefined
```

### NEGATIVE_INFINITY

The NEGATIVE_INFINITY property represents negative infinity, means something that is lower than any other number.

#### Example

```
console.log(Number.NEGATIVE_INFINITY)
//-Infinity
```

NEGATIVE_INFINITY is a static property of the JavaScript Number object.

You can only use it as Number.NEGATIVE_INFINITY.

Using x.NEGATIVE_INFINITY, where x is a number or a Number object, will return undefined:

```
number = 1;
console.log(number.NEGATIVE_INFINITY);
//undefined
```

### NaN

The NaN property represents “Not-a-Number” value. This property indicates that a value is not a legal number.

The NaN property is the same as the Number.Nan property.

Checkout this related post: The Difference Between IsNaN() Method And IsNaN() Function In JavaScript

### POSITIVE_INFINITY

The POSITIVE_INFINITY property represents positive infinity which is something that is higher than any other number.

#### Example

```
console.log(Number.POSITIVE_INFINITY)
//Infinity
```

POSITIVE_INFINITY a static property of the JavaScript Number object.

You can only use it as Number.POSITIVE_INFINITY.

Using x.POSITIVE_INFINITY, where x is a number or a Number object, will return undefined:

```
number = 1;
console.log(number.POSITIVE_INFINITY);
//undefined
```

### prototype

The prototype constructor allows you to add new properties and methods to JavaScript numbers.

When constructing a **property**, ALL numbers will be given the property, and its value, as default.

When constructing a **method**, ALL numbers will have this method available.

#### Example

```
Number.prototype.methodTemp = function() {
return this.valueOf() * 2;
};
function tempFunction() {
var number = 1;
document.getElementById("any").innerHTML = n.methodTemp();
}
//assuming we have HTML element with an id = any
//it will print 2
```

Number.prototype does not refer to a single number object, but to the Number() object itself.

Prototype is a global object constructor which is available for all JavaScript objects.

### Number Properties Cannot be Used on Variables

Number properties belongs to the JavaScript’s number object wrapper called Number.

These properties can only be accessed as Number.MAX_VALUE.

Using myNumber.MAX_VALUE, where myNumber is a variable, expression, or value, will return undefined:

```
var a = 1;
var b = a.MAX_VALUE;
console.log(b);
//undefined
```

Credit: w3schools