Properties of the Number -28028

Twenty-Eight Thousand Twenty-Eight

Basics

Value: -28029 → -28028 → -28027

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ² × 7 ² × 11 × 13

Divisors: 1, 2, 4, 7, 11, 13, 14, 22, 26, 28

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110110101111100

Octal: -66574

Duodecimal: -14278

Hexadecimal: -6d7c

Square: 785568784

Square Root: 167.41565040341956

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

Triangle read by rows: T(n, k) is the number of diagonal dissections of a convex n-gon into k+1 regions. A33282

Triangle obtained by adding a leading diagonal 1,0,0,0,... to A033282. A86810

Triangle read by rows: T(n,k) is the number of Schroeder paths of semilength n containing exactly k peaks but no peaks at level one (n >= 1; 0 <= k <= n-1). A126216

Partial sums of A002419. A51843

Triangle T(n,k), 0 <= k <= n, read by rows, given by [1,1,1,1,1,1,1,...] δ [0,1,0,1,0,1,0,1,0,...] where δ is the operator defined in A084938. A133336

Cubefree part of n!. A145642

Expansion of g.f.: (1+4·x)/(1-x)⁷. A51946

Number of diagonal dissections of a convex n-gon into n-5 regions. A2056

Number of diagonal dissections of an n-gon into 6 regions. A33278

Number of symmetric nonnegative integer 8 X 8 matrices with sum of elements equal to 4·n, under action of dihedral group D₄. A54498