Properties of the Number 84644

Eighty-Four Thousand Six Hundred Forty-Four

Basics

Value: 84643 → 84644 → 84645

Parity: even

Prime: No

Previous Prime: 84631

Next Prime: 84649

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 ² × 7 × 3023

Divisors: 1, 2, 4, 7, 14, 28, 3023, 6046, 12092, 21161

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10100101010100100

Octal: 245244

Duodecimal: 40B98

Hexadecimal: 14aa4

Square: 7164606736

Square Root: 290.9364191709247

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 both k and k+1 are abundant. A96399

Numbers k such that both σ(k) >= 2·k-1 and σ(k+1) >= 2*(k+1)-1. A103289

Numbers k such that both k and k+1 are Zumkeller numbers (A083207). A328327

a(n) = Sum_k k·A333275(n,k). A333277

Number of nX5 0..1 arrays with no element unequal to a strict majority of its king-move neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards. A280230

Best packings of m>1 equal circles into a larger circle setting a new density record. A84644

T(n,k)=Number of nXk 0..1 arrays with no element unequal to a strict majority of its king-move neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards. A280233