What are Harshad numbers?

Harshad numbers are integers divisible by the sum of their own digits. They are also known as Niven numbers.

Is 0 a Harshad number?

Under RNGdle’s rule the digit sum must be > 0, so 0 is not treated as Harshad.

Does RNGdle score Harshad numbers?

Yes. Rolls divisible by their digit sum earn the Harshad Number badge.

RNGdle is a free browser game where you generate one random number from 0 to 1,000,000 each day. Instead of guessing words, RNGdle analyzes your roll for numerical patterns, awards badges, and scores EP (entropy points) so every daily number feels like a collectible result.

How does RNGdle scoring work?

RNGdle scoring adds EP from every badge your number unlocks. Badges in the same family supersede each other—only the highest-EP badge in that family counts—then your total EP ranks the roll from Trash and Common up through Rare, Epic, Anomaly, and Mythic.

How do you play RNGdle?

To play RNGdle, open the site and press GENERATE for today's official roll. Review the badges, check your EP and rarity tier, share the result if you like, then return after midnight for a fresh daily number.

What RNGdle badges can you get?

RNGdle badges cover mathematical and novelty patterns: perfect powers, consecutive digit runs, pairs and of-a-kind sets, palindromes, zero/void ladders, pi and e slices, plus meme exacts like Nice (69), Botanist (420), and Jackpot (777). New rolls can unlock many badges at once.

Is RNGdle a daily game?

Yes. RNGdle is a daily game with one official GENERATE per calendar day. After you roll, the next official number unlocks after midnight, which keeps each day's result unique and shareable.

What features are local in this RNGdle version?

In this RNGdle version, your daily roll, badge collection, lifetime EP, theme preference, and recent history are stored locally in the browser. You can play without creating an account; clearing site data resets local progress.

GuideHarshad

Harshad Numbers

A Harshad number (also called a Niven number) is a positive integer divisible by the sum of its decimal digits. Example: 18, because 1+8 = 9 and 18 ÷ 9 = 2.

95,428 values in 0–1,000,000

Formula

digitSum(n) > 0 and n ≡ 0 (mod digitSum(n)).

How to check

Sum the digits of n. If that sum is positive and divides n with no remainder, n is Harshad.

Example

198
198 → 1+9+8 = 18, and 198 ÷ 18 = 11, so 198 is Harshad. 197 → 1+9+7 = 17, and 197 is not divisible by 17.

Look up EP for this number in the calculator.

In RNGdle

Harshad numbers are common enough to show up often, but still a clean pattern signal. RNGdle awards the Harshad Number badge when the digit-sum rule holds.

Harshad Number — Divisible by the sum of its own digits. (+1,048 EP)

Examples across the range

95,428 total · 36 samples spaced from low to high.

127,78355,56683,340111,114138,898166,671194,454222,225250,002277,797305,559333,342361,116388,892416,691444,452472,230500,004527,790555,584583,362611,118638,894666,684694,462722,232750,006777,788805,568833,352861,120888,912916,674944,460972,240

FAQ

What are Harshad numbers?: Harshad numbers are integers divisible by the sum of their own digits. They are also known as Niven numbers.
Is 0 a Harshad number?: Under RNGdle’s rule the digit sum must be > 0, so 0 is not treated as Harshad.
Does RNGdle score Harshad numbers?: Yes. Rolls divisible by their digit sum earn the Harshad Number badge.