Properties of the Number 28120

Twenty-Eight Thousand One Hundred Twenty

Basics

Value: 28119 → 28120 → 28121

Parity: even

Prime: No

Previous Prime: 28111

Next Prime: 28123

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 ³ × 5 × 19 × 37

Divisors: 1, 2, 4, 5, 8, 10, 19, 20, 37, 38

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110110111011000

Octal: 66730

Duodecimal: 14334

Hexadecimal: 6dd8

Square: 790734400

Square Root: 167.69019053003666

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

Sum of all partitions of n into distinct parts. A66189

a(n) = n*(n - 1)*(n + 2)/2. A77414

Sum of square displacements over all self-avoiding n-step walks on a square lattice with the first step specified. Numerator of mean square displacement s(n)=a(n)/A046661(n). A78797

Expansion of (sqrt(1+2x) + sqrt(1-2x))/(2*(1-2x)^3/2). A99325

Nonnegative values·of solutions (x, y) to the Diophantine equation x²+(x+329)² = y². A205672

Right edge of the triangle A045975. A204557

E.g.f. B = B(x,y) satisfies: A² + B² + C² = 1 + y² and A³ + B³ + C³ = 1 + y³, where functions A = A(x,y) and C = C(x,y) are described by A278885 and A278887, respectively. A278886

E.g.f. C = C(x,y) satisfies: A² + B² + C² = 1 + y² and A³ + B³ + C³ = 1 + y³, where functions A = A(x,y) and B = B(x,y) are described by A278885 and A278886, respectively. A278887

Partial sums of A294629. A294630

a(n) = (n⁴ + 5·n³ + 11·n² + 7·n)/6. A332697