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Properties of the Number 6840

Six Thousand Eight Hundred Forty

Basics

Value: 6839 → 6840 → 6841

Parity: even

Prime: No

Previous Prime: 6833

Next Prime: 6841

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 3 × 3 2 × 5 × 19

Divisors: 1, 2, 3, 4, 5, 6, 8, 9, 10, 12

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 1101010111000

Octal: 15270

Duodecimal: 3B60

Hexadecimal: 1ab8

Square: 46785600

Square Root: 82.70429251254133

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

a(n) = n*(n-1)*(n-2) (or n!/(n-3)!). A7531
Number of partitions of n into relatively prime parts such that multiplicities of parts are also relatively prime. A100953
Number of integer partitions of n not containing their mean. A327472
Number of integer partitions of n whose mean is not an integer. A349156
a(n) = σ(n) * A003961(n), where A003961 shifts the prime factorization of n one step towards larger primes, and σ is the sum of the divisors of n. A341529
Number of maximal subsets of {1..n} such that it is possible to choose a different prime factor of each element. A370585
Order of the group SL(2,Zn). A56
Number of partitions of n minus number of divisors of n. A144300
Number of ways to place 2 nonattacking kings on an n X n board. A61995
Left diagonal of partition triangle A047812. A7042