#### What Is Euler's Number? A Beginner-Friendly Overview

From beginner-friendly definitions to the math behind it, here’s your easy-to-follow overview of Euler’s number and its applications.

Jan 5, 2022

A number is **divisible by 9** if the *sum of the digits is divisible by 9.*

To determine if the number 738 is divisible by 9, we find the sum of its digits. Seven plus three plus eight gives us a final sum of eighteen. Eighteen is divisible by 9. So,

**738 is divisible by 9.**

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