Properties of the Number 28443

Twenty-Eight Thousand Four Hundred Forty-Three

Basics

Value: 28442 → 28443 → 28444

Parity: odd

Prime: No

Previous Prime: 28439

Next Prime: 28447

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 19 × 499

Divisors: 1, 3, 19, 57, 499, 1497, 9481, 28443

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110111100011011

Octal: 67433

Duodecimal: 14563

Hexadecimal: 6f1b

Square: 809004249

Square Root: 168.65052623694953

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

Numbers n such that in n³ the parity of digits alternates. A30159

a(n) = ∑_k=0..n binomial(3·n+k-1,k) * binomial(n-1,n-k). A378612

Sum{T(n-k,k)}, 0<=k<=[ n/2 ], T given by A026703. A26713

Nearest integer to the space diagonal of the smallest (measured by the longest edge) primitive (gcd(a,b,c)=1) Euler bricks (a, b, c, sqrt(a² + b²), sqrt(b² + c²), sqrt(a² + c²) are integers). If the space diagonal is an integer then the Euler brick is called a "perfect cuboid". There are no known perfect cuboids. A141029

a(n) = (n+1)*n⁴. A101362

Erroneous version of A001108. A28443