Properties of the Number 28666

Twenty-Eight Thousand Six Hundred Sixty-Six

Basics

Value: 28665 → 28666 → 28667

Parity: even

Prime: No

Previous Prime: 28663

Next Prime: 28669

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 2 × 11 × 1303

Divisors: 1, 2, 11, 22, 1303, 2606, 14333, 28666

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110111111111010

Octal: 67772

Duodecimal: 1470A

Hexadecimal: 6ffa

Square: 821739556

Square Root: 169.3103658964802

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) = 7·2ⁿ - 6. A48489

Number of n-step self-avoiding walks on hexagonal lattice from (0,0) to (2,2). A5553

a(n) = a(n-1) + 2·a(n-4) - 2·a(n-5) for n >= 5, where a(0) = 2, a(1) = 4, a(2) = 6, a(3) = 8, a(4) = 10. A288732

G.f.: (1+3·x+2·x²)/((1-x)*(1-2·x²)). A63757

Number of 1's in binary expansion of parts in all partitions of n. A66624

Constant term of the reduction by x² -> x+1 of the polynomial p(n,x) defined below in Comments. A192426

Main diagonal of square arrays A114881 and A249741. A249743

Number of cryptarithms of the form x + y = z in base n for which no summand contains any letter more than once and which have at least one solution. A277497

Centered heptagonal numbers which are sphenic numbers. A360183

Potential magic constants of a 10 X 10 magic square composed of consecutive primes. A192087