Properties of the Number 28200

Twenty-Eight Thousand Two Hundred

Basics

Value: 28199 → 28200 → 28201

Parity: even

Prime: No

Previous Prime: 28183

Next Prime: 28201

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 2 ³ × 3 × 5 ² × 47

Divisors: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110111000101000

Octal: 67050

Duodecimal: 143A0

Hexadecimal: 6e28

Square: 795240000

Square Root: 167.92855623746667

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

G.f. A(x) satisfies: 4 = ∑_n=-oo..oo (-x)^n*(n+1/2) * A(x)^n*(n-1/2). A354664

Principal diagonal of the convolution array A213819. A213820

Non-palindromic numbers n such that n·reverse(n) is a square and n and reverse(n) do not have the same number of digits. A322835

a(n) = 49·n² - n. A157923

a(n) = 196·n² - 2·n. A158224

G.f.: A(x,y) = ∑_n>=0 xⁿ * ∏_k=1..n (k + x·y) / (1 + k·x*y), as a triangle read by rows. A231171

Real part of the sum over the n-th powers of all Gaussian integers in the n X n base square in the first quadrant. A232819

Imaginary part of the sum over the n-th powers of all Gaussian integers in the n X n base square in the first quadrant. A232820

Values of m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,9. A64241

a(n) = 576·n² - 24. A158636