Properties of the Number 27280

Twenty-Seven Thousand Two Hundred Eighty

Basics

Value: 27279 → 27280 → 27281

Parity: even

Prime: No

Previous Prime: 27277

Next Prime: 27281

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 ⁴ × 5 × 11 × 31

Divisors: 1, 2, 4, 5, 8, 10, 11, 16, 20, 22

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110101010010000

Octal: 65220

Duodecimal: 13954

Hexadecimal: 6a90

Square: 744198400

Square Root: 165.16658257650062

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*φ¹⁵), where φ is the golden ratio, A001622. A4930

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the maximum plus the minimum minus the upper median minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one. A237384

Smallest number with middle divisors whose distance to the next number with middle divisors is n. A280295

a(n) = binomial(2·n,n) mod ((n+1)*(n+2)*(n+3)). A65345

Row sums of triangle A134480. A134481

G.f.: -x*(1-2·x+2·x²)/(2·x³-4·x²+4·x-1). A78484

Number of binary strings of length 2n that contain the ones' complements and the reversals of each of their two halves. A237502

a(n) = round(n*φ¹⁵), where φ is the golden ratio, A001622. A4950

Number of (n+1) X (1+1) 0..2 arrays with the maximum plus the minimum minus the upper median minus the lower median of every 2 X 2 subblock differing from its horizontal and vertical neighbors by exactly one. A237377

Number of (n+1)X(5+1) 0..2 arrays with the maximum plus the minimum minus the upper median minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one. A237381