freecodecamp--freecodecamp/curriculum/challenges/english/blocks/daily-coding-challenges-javascript/69cfca90e8a0a6d4d6871c52.md

id, title, challengeType, dashedName

id	title	challengeType	dashedName
69cfca90e8a0a6d4d6871c52	Challenge 268: Narcissistic Number	28	challenge-268

--description--

Given a positive integer, determine whether it is a narcissistic number.

• A number is narcissistic if the sum of each of its digits raised to the power of the total number of digits equals the number itself.

For example, 153 has 3 digits, and 1³ + 5³ + 3³ = 153, so it is narcissistic.

--hints--

isNarcissistic(153) should return true.

assert.isTrue(isNarcissistic(153));

isNarcissistic(154) should return false.

assert.isFalse(isNarcissistic(154));

isNarcissistic(371) should return true.

assert.isTrue(isNarcissistic(371));

isNarcissistic(512) should return false.

assert.isFalse(isNarcissistic(512));

isNarcissistic(9) should return true.

assert.isTrue(isNarcissistic(9));

isNarcissistic(11) should return false.

assert.isFalse(isNarcissistic(11));

isNarcissistic(9474) should return true.

assert.isTrue(isNarcissistic(9474));

isNarcissistic(6549) should return false.

assert.isFalse(isNarcissistic(6549));

--seed--

--seed-contents--

function isNarcissistic(n) {

  return n;
}

--solutions--

function isNarcissistic(n) {
  const digits = String(n).split('');
  const power = digits.length;
  const sum = digits.reduce((acc, d) => acc + Math.pow(Number(d), power), 0);
  return sum === n;
}