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Properties of the Number 28340

Twenty-Eight Thousand Three Hundred Forty

Basics

Value: 28339 → 28340 → 28341

Parity: even

Prime: No

Previous Prime: 28319

Next Prime: 28349

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 2 × 5 × 13 × 109

Divisors: 1, 2, 4, 5, 10, 13, 20, 26, 52, 65

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110111010110100

Octal: 67264

Duodecimal: 14498

Hexadecimal: 6eb4

Square: 803155600

Square Root: 168.34488409215172

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

Triangle of coefficients of g.f. a*(1+x)n + b*(1-x)n+2*polylog(-n-1, x)/x + 2n*c*(1-x)n+1*LerchPhi(x, -n, 1/2), with a = -2, b = 2, c = 1. A168524
Practical numbers z such that z2 = x2 + y2 for some practical numbers·and y with gcd(x,y,z) = 4. A294112
Sum of the first n twin prime pairs. A86169
Least positive integer m such that m·n divides F(m+n), where F(k) denotes the k-th Fibonacci number A000045(k). A297573
Number of length n+1 0..2·1 arrays with the sum of the absolute values of adjacent differences equal to n·1. A249975
T(n,k) is the number of length n+1 0..2·k arrays with the sum of the absolute values of adjacent differences equal to n·k. A249982
Coefficient of x3 in expansion of (x+1)*(x+3)*...*(x+2·n-1). A28340
Digits (after the leading "0.") of "Type-2 Trott-like Constants" (see Comments lines for definition). A178160
Number of nX3 0..3 arrays with every element neighboring horizontally or vertically both a 0 and a 1, and 2 introduced before 3 in row major order. A204296
1/6 the number of colorings of a 4 X 4 rhombic- or staggered- hexagonal array with n colors. A68245