A number is a mathematical object used to count, measure, and label.
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In JavaScript, Number type is double-precision 64-bit binary format IEEE 754 value. This package includes common number functions related to querying about numbers, comparing numbers, rounding numbers, performing rounded division, performing modulo operations, controlling range of numbers, performing arithmetic operations, obtaining divisors of a number (and related operations), getting the number of possible arrangements of a set of objects, performing geometry-related calculations, performing basic statistical analysis, and finding various statistical means.

This package is available in Node.js and Web formats. To use it on the web, simply use the extra_number global variable after loading with a <script> tag from the jsDelivr CDN.

Stability: Experimental.

const xnumber = require('extra-number');
// import * as xnumber from "extra-number";
// import * as xnumber from "https://unpkg.com/extra-number/index.mjs"; (deno)

xnumber.isPrime(53);
// → true

xnumber.properDivisors(6);
// → [1, 2, 3]

xnumber.round(9.1357, 0.05);
// → 9.15

xnumber.significantDigits(0.0034);
// → 2

// TOFIX:
// xnumber.fromRoman('DCXLIX');
// → 649

// xnumber.toScientific(695700000);
// → '6.957×10⁸' (radius of Sun in m)

• Javascript reference: MDN Web docs
• Processing reference
• Fastest way to compute the greatest common divisor
• Calculating median - javascript
• What is the fastest way to count the number of significant digits of a number?
• alawatthe/MathLib
• float package by Michael Storgaard