Properties of the Number 28226

Twenty-Eight Thousand Two Hundred Twenty-Six

Basics

Value: 28225 → 28226 → 28227

Parity: even

Prime: No

Previous Prime: 28219

Next Prime: 28229

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 × 11 × 1283

Divisors: 1, 2, 11, 22, 1283, 2566, 14113, 28226

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110111001000010

Octal: 67102

Duodecimal: 14402

Hexadecimal: 6e42

Square: 796707076

Square Root: 168.00595227550718

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

Triangular matrix T, read by rows, that satisfies: SHIFT_LEFT(column 0 of T^(2·p-1/2)) = (2·p-1)*(column p of T), or [T^(2·p-1/2)](m,0) = (2·p-1)*T(p+m,p+1) for all m>=1 and p>=0. A105615

Number of numbers of complexity n, i.e., that can be built from n ones using + and *, and require at least that many ones. A5421

Row sums of triangle A179901. A179902

G.f. A(x) satisfies: A(x) = x + x² * exp(A(x) - A(-x²)/2 + A(x³)/3 - A(-x⁴)/4 + ...). A345234

Smallest index k such that Fibonacci(k) contains Fibonacci(n) as a proper substring in decimal notation. A263400

Number of nX4 0..1 arrays with every element unequal to 0, 1, 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero. A317425

Numbers k > 1 such that (3/2)^k sets a new record for closest fractional part to 1/2. A334264

T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 1, 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero. A317429

Expansion of 1/((1-7x)(1-9x)(1-10x)(1-12x)). A28226