Throughout history, numbers have been attributed with various meanings and significance such as numerology, superstition, and important dates. Today, we’ll explore 10 interesting facts about the number 4.

The number 4 is unique as it’s the only number that has the same number of letters as its value.

A composite number is a positive number that’s the result of multiplying two numbers that are lower than themselves. The number 4 is the smallest composite number as it’s the product of two 2’s.

Scientists believe that there are at least four dimensions, with the fourth dimension being time.

US President Franklin D. Roosevelt believed that everyone in the world should have four basic freedoms: Freedom from Want, Freedom of Speech, Freedom from Fear, and Freedom of Religion.

The most basic unit of information is known as a bit, with four bits (or half a byte) being known as a nibble.

The chemical element beryllium has the atomic number 4 and is commonly used in the aerospace industry due to its lightweight and shape-holding properties.

Four-stroke engines, commonly used in cars, require the piston to move up or down four times in each cylinder to create mechanical energy.

Baseball, a popular sport, has four bases, and if a pitcher throws four “balls,” the batter gets to walk to first base. Additionally, the most runs a batter can score from one hit is four, known as a grand slam.

In many Asian cultures, including China, Japan, and Korea, the number four is considered unlucky because it sounds similar to the word for death. This is why many buildings in Eastern Asia skip the fourth floor entirely. On world maps, each country is shaded in a different color to make it easier to differentiate between them. Francis Guthrie discovered in 1852 that only four colors are needed for this. The number four is one of the lowest numbers and is present everywhere. However, for those from Eastern Asia who have a fear of the number four, it may be a significant obstacle in their daily lives.

## FAQ

**1. What is the significance of the number 4 in Chinese culture?**

The number 4 is considered unlucky in Chinese culture because it sounds similar to the word for “death” in Chinese. Therefore, many buildings in China, especially hospitals, omit the fourth floor, and phone numbers containing the number 4 are often avoided.

**2. What is the mathematical significance of the number 4?**

The number 4 is the only number in the English language that has the same number of letters as its value. It is also the smallest composite number, meaning it can be factored into smaller whole numbers, and the first square number, meaning it can be expressed as the product of a number with itself.

**3. What is the significance of the number 4 in religion?**

In Christianity, the number 4 represents the four evangelists: Matthew, Mark, Luke, and John. In Hinduism, the number 4 represents the four Vedas, which are the sacred texts of Hinduism. In Buddhism, the number 4 represents the Four Noble Truths, which are the foundation of Buddhist teachings.

**4. Why is the number 4 significant in Japanese culture?**

The number 4 is considered unlucky in Japanese culture because it sounds similar to the word for “death” in Japanese. Therefore, many buildings in Japan, especially hospitals, omit the fourth floor, and phone numbers containing the number 4 are often avoided.

**5. What are some interesting facts about the number 4?**

The number 4 is the only number that, when spelled out, has the same number of letters as its value. It is also the only number that is both a square number and a triangular number. Additionally, the Winter Olympics, which occur every 4 years, are always held in a year that is divisible by 4.

Zayn Anderson is a prolific writer with a passion for uncovering the world’s intriguing facts. Armed with an insatiable curiosity, he delves into various subjects, from history and science to nature and technology.