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Properties of the Number 28612

Twenty-Eight Thousand Six Hundred Twelve

Basics

Value: 28611 → 28612 → 28613

Parity: even

Prime: No

Previous Prime: 28607

Next Prime: 28619

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 2 × 23 × 311

Divisors: 1, 2, 4, 23, 46, 92, 311, 622, 1244, 7153

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110111111000100

Octal: 67704

Duodecimal: 14684

Hexadecimal: 6fc4

Square: 818646544

Square Root: 169.15082027587096

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

Triangular matrix T, read by rows, that satisfies: [Tk](n,k) = T(n,k-1) for n>=k>0, or, equivalently, (column k of Tk) = SHIFTLEFT(column k-1 of T) when zeros above the diagonal are ignored. A107876
Numbers n such that Bernoulli number Bn has denominator 1410. A272369
Column 1 of triangle A107876. A107877
Integers j not of form 3m+2 such that for any integer k > 0, j·10k+1 has a divisor in the set { 7, 11, 13, 37 }. A243969
Matrix square of triangle A107876; equals matrix product of triangles: A1078762 = A107862^-1·A107870 = A107867^-1·A107873. A107880
a(n) = n*(n+1)*(14·n-11)/6. A172076
G.f. A(x) satisfies: [xk] A(x) / (1-x)n = 0 for k = n*(n+1)/2 + 1 through k = (n+1)*(n+2)/2 for n >= 0. A305605
Structured deltoidal hexacontahedral numbers (vertex structure 9). A100166
Matrix inverse of triangle A098568, where A098568(n, k) = C( (k+1)*(k+2)/2 + n-k-1, n-k) for n>=k>=0. A121434
Matrix inverse of triangle A122175, where A122175(n,k) = C( k*(k+1)/2 + n-k, n-k) for n>=k>=0. A121435