Properties of the Number 28448

Twenty-Eight Thousand Four Hundred Forty-Eight

Basics

Value: 28447 → 28448 → 28449

Parity: even

Prime: No

Previous Prime: 28447

Next Prime: 28463

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 ⁵ × 7 × 127

Divisors: 1, 2, 4, 7, 8, 14, 16, 28, 32, 56

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 110111100100000

Octal: 67440

Duodecimal: 14568

Hexadecimal: 6f20

Square: 809288704

Square Root: 168.6653491384641

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

Ruth-Aaron numbers (2): sum of prime divisors of n = sum of prime divisors of n+1 (both taken with multiplicity). A39752

Triangle read by rows: T(n,k) is the number of permutations of n elements that have the longest cycle length k. A126074

Numbers k such that there is 1 prime between 100·k and 100·k + 99. A186393

Number of interior points that are the intersections of exactly two chords in the configuration A006561(n). A292104

T(n,k) = number of defective 3-colorings of an n X k 0..2 array connected horizontally, diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..2 order. A229637

G.f. A(x,y) satisfies: x·y*A(x,y) = ∑_n=-oo..+oo (-1)ⁿ * x^n*(n+1/2) * A(x,y)ⁿ, with coefficients T(n,k) of xⁿ*y^k in A(x,y) given as a triangle read by rows. A355360

T(n,k)=Number of nXk 0..3 arrays with no element equal to zero plus the sum of elements to its left or zero plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest, modulo 4. A240327

Column 2 of triangle A318945. A318947

Number of permutations in the symmetric group S_n such that the maximal cycle has length exactly 3. A71007

Numerators of the rational convergents to the periodic continued fraction 1/(2 + 1/(7 + 1/(2 + 1/(7 + ...)))). A243470