Properties of the Number 28397

Twenty-Eight Thousand Three Hundred Ninety-Seven

Basics

Value: 28396 → 28397 → 28398

Parity: odd

Prime: No

Previous Prime: 28393

Next Prime: 28403

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 73 × 389

Divisors: 1, 73, 389, 28397

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110111011101101

Octal: 67355

Duodecimal: 14525

Hexadecimal: 6eed

Square: 806389609

Square Root: 168.51409436602032

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

Number of non-isomorphic multiset partitions of weight n in which both the multiset union of the parts and the multiset union of the dual parts are aperiodic. A320800

Triangle T(n,k) = A176492(n,k) + A008292(n+1,k+1) - 1 read along rows 0<=k<=n. A176492

Number of nX6 0..1 arrays with every element equal to 1, 2, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. A300767

Number of nX7 0..1 arrays with every element equal to 1, 2, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. A300768

a(n) = 1 + 1/log(γ(2-a(n-1))). A98081

a(1) = a(2) = 1; a(n+2) = 1 + ∑_d∣n a(n/d) * a(d). A346116

Start at n and iterate the map in A006368; a(n) is the smallest number in the trajectory. A28397

T(n,k)=Number of nXk 0..1 arrays with every element equal to 1, 2, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. A300769