Properties of the Number 28747

Twenty-Eight Thousand Seven Hundred Forty-Seven

Basics

Value: 28746 → 28747 → 28748

Parity: odd

Prime: No

Previous Prime: 28729

Next Prime: 28751

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 17 × 19 × 89

Divisors: 1, 17, 19, 89, 323, 1513, 1691, 28747

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111000001001011

Octal: 70113

Duodecimal: 14777

Hexadecimal: 704b

Square: 826390009

Square Root: 169.54940282997165

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

Constant term of the reduction by x²->x+1 of the polynomial p(n,x) = 1 + xⁿ + x²ⁿ. A192464

Least positive·in the Diophantine equation x³ + y³ = n·z³ (with x >= y and y ≠ 0). A190356

a(n) = T(n,n-3), where T is the array in A026374. A26382

Matrix square of triangle V = A136230, read by rows. A136234

a(n) = T(n,n-3), where T is the array in A026386. A26394

Partial sums of 3-almost primes which are again 3-almost primes, i.e., have exactly 3 not necessarily distinct prime factors. A217018

Number of partitions of n that contain {1,2} minus number of partitions of n that contain neither 1 nor 2. A324368

Nonsquares mod 34. A28747

Number of nX7 0..1 arrays with every element unequal to 0, 1, 2 or 5 king-move adjacent elements, with upper left element zero. A303960

Number of real polynomial invariants for the action of 4 copies of U(2) on the fourth tensor power of C². A129550