Properties of the Number 28321

Twenty-Eight Thousand Three Hundred Twenty-One

Basics

Value: 28320 → 28321 → 28322

Parity: odd

Prime: No

Previous Prime: 28319

Next Prime: 28349

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 127 × 223

Divisors: 1, 127, 223, 28321

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110111010100001

Octal: 67241

Duodecimal: 14481

Hexadecimal: 6ea1

Square: 802079041

Square Root: 168.28844285927659

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 partitions p of n such that (number of even numbers in p) <= 2*(number of odd numbers in p). A241642

Number of terms in A255967 less than 10ⁿ. A255971

Boustrophedon transform of 1, 1, 4, 9, 16, ... A697

Positions of incrementally largest terms in the continued fraction for Euler's constant γ (A002852). A33092

Number of 2 X 2 matrices with all elements in {0,1,...,n} and nonnegative even determinant. A210371

Indices of centered heptagonal numbers (A069099) which are also centered square numbers (A001844). A253460

p-INVERT of (0,0,1,2,3,5,8,...), the Fibonacci numbers preceded by two zeros, where p(S) = 1 - S - S². A289976

a(n) = M(n) + m(n) for n >= 2, where M(n) = max{ a(i) + a(n-i): i = 1..n-1 }, m(n) = min{ a(i) + a(n-i): i = 1..n-1 }. A22905

Third row of Pascal-(1,7,1) array A081582. A81593

a(n) = 128·n² + 2528·n + 12481. A157436