Properties of the Number 28690

Twenty-Eight Thousand Six Hundred Ninety

Basics

Value: 28689 → 28690 → 28691

Parity: even

Prime: No

Previous Prime: 28687

Next Prime: 28697

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 × 5 × 19 × 151

Divisors: 1, 2, 5, 10, 19, 38, 95, 151, 190, 302

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 111000000010010

Octal: 70022

Duodecimal: 1472A

Hexadecimal: 7012

Square: 823116100

Square Root: 169.38122682280937

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

a(n) = floor(n*φ¹⁶), where φ is the golden ratio, A001622. A4931

T(n,k)=Number of nXk 0..1 arrays with no adjacent rows or columns having the same least squares slope fit to a straight line, with a single point array taken as having zero slope. A223154

Number of (w,x,y) with all terms in {0,...,n} and w ≠ min(|w-x|, |x-y|, |y-w|). A213492

27-gonal pyramidal numbers: a(n) = n*(n+1)*(25·n-22)/6. A256647

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 369", based on the 5-celled von Neumann neighborhood. A268503

Weight distribution of [152,76,20] binary extended quadratic-residue (or QR) code. A145686

Number of nX4 0..1 arrays with no adjacent rows or columns having the same least squares slope fit to a straight line, with a single point array taken as having zero slope. A223152

Sorted Galois and Pseudo-Galois numbers. A28690