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Properties of the Number 16828

Sixteen Thousand Eight Hundred Twenty-Eight

Basics

Value: 16827 → 16828 → 16829

Parity: even

Prime: No

Previous Prime: 16823

Next Prime: 16829

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 2 × 7 × 601

Divisors: 1, 2, 4, 7, 14, 28, 601, 1202, 2404, 4207

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100000110111100

Octal: 40674

Duodecimal: 98A4

Hexadecimal: 41bc

Square: 283181584

Square Root: 129.7227813454522

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: row n is the first row of the matrix M[n]n-1, where M[n] is the n X n tridiagonal matrix with main diagonal (3,4,4,...) and super- and subdiagonals (1,1,1,...). A124574
Number of connected 4-regular simple graphs on n vertices with girth at least 4. A33886
Triangular array C(n, k) = number of connected k-regular graphs, having girth at least 4, with n nodes, 0 <= k <= n div 2. A186714
Number of connected 4-regular simple graphs on n vertices with girth exactly 4. A184944
Positive numbers of the form x4 - 6·x2 * y2 + y4 (where x,y are integers). A135789
Triangular array C(n,k) counting connected k-regular simple graphs on n vertices with girth exactly 4. A186734
Irregular triangle C(n,g) counting the connected 4-regular simple graphs on n vertices with girth exactly g. A184940
Irregular triangle C(n,g) counting the connected 4-regular simple graphs on n vertices with girth at least g. A184941
Number of necklaces with n beads of unlabeled colors such that the numbers of beads per color are distinct. A261531
a(n) = A122536(n) - A216958(n). A216960