Properties of the Number 2420

Two Thousand Four Hundred Twenty

Basics

Value: 2419 → 2420 → 2421

Parity: even

Prime: No

Previous Prime: 2417

Next Prime: 2423

Digit Sum: 8

Digital Root: 8

Palindrome: No

Factorization: 2 ² × 5 × 11 ²

Divisors: 1, 2, 4, 5, 10, 11, 20, 22, 44, 55

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 100101110100

Octal: 4564

Duodecimal: 1498

Hexadecimal: 974

Square: 5856400

Square Root: 49.193495504995376

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Second pentagonal numbers: a(n) = n*(3·n + 1)/2. A5449

a(1)=1, a(n) = n·a(floor(n/2)). A98844

a(n) = 5·n². A33429

Numbers whose unsorted prime signature is not unimodal. A332282

Multiples of 20 containing a 20 in their decimal representation. A121040

Numbers k such that k⁶⁴ + 1 is prime. A6316

a(n) = (prime(n)² - 1)/24. A24702

Numbers k that divide 3^k - 1. A67945

Numbers k such that k² divides 9^k - 1. A127101

Numbers k such that k² divides 3^k-1. A127103