Properties of the Number 11780

Eleven Thousand Seven Hundred Eighty

Basics

Value: 11779 → 11780 → 11781

Parity: even

Prime: No

Previous Prime: 11779

Next Prime: 11783

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 ² × 5 × 19 × 31

Divisors: 1, 2, 4, 5, 10, 19, 20, 31, 38, 62

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10111000000100

Octal: 27004

Duodecimal: 6998

Hexadecimal: 2e04

Square: 138768400

Square Root: 108.53570840972108

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

Numbers k such that k and k+1 have 4 distinct prime factors. A140078

a(n) = 2·n*(4·n + 3). A33587

Numbers k such that k and k+1 each have at least 4 distinct prime factors. A321504

a(n) = n*(15·n-11)/2. A226489

Positions of +4's in A346242. A354814

Row sums of A075652. A75650

Expansion of 1/((1-x)*(1+3·x)*(1-4·x)). A249997

Numbers n such that p(12n) is prime, where p(n) is the number of partitions of n. A115214

Numbers n such that n and n+1 both have 24 divisors. A274362

Smallest k for which a chain of linked rods of length 1, ..., k can be folded in half in exactly n dictinct ways. A390056