Properties of the Number 26380

Twenty-Six Thousand Three Hundred Eighty

Basics

Value: 26379 → 26380 → 26381

Parity: even

Prime: No

Previous Prime: 26371

Next Prime: 26387

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 ² × 5 × 1319

Divisors: 1, 2, 4, 5, 10, 20, 1319, 2638, 5276, 6595

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110011100001100

Octal: 63414

Duodecimal: 13324

Hexadecimal: 670c

Square: 695904400

Square Root: 162.41921068642097

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) = n·a(n-1) - a(n-2) with a(0) = 0, a(1) = 1. A58798

Sum of squares of four consecutive primes. A133524

Array (a frieze pattern) defined by a(n,k) = (a(n-1,k)*a(n-1,k+1) - 1) / a(n-2,k+1), read by antidiagonals. A7754

T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock diagonal maximum minus antidiagonal median nondecreasing horizontally and vertically. A254457

a(n) = 5·6ⁿ - 4·5ⁿ. A257286

Number of tilings of a 5 X n rectangle using n pentominoes of shapes X, Y, Z. A349187

Table read by downward antidiagonals: T(n,k) is the number of tilings of the n X k torus up to horizontal reflections by a tile that is not fixed under horizontal reflection. A368306

G.f.: ∑_n>=0 (x^2·n-1 + 1)ⁿ * xⁿ / (1 + x^2·n+1)ⁿ⁺¹, an even function. A326602

Number of (n+2)X(2+2) 0..1 arrays with every 3X3 subblock diagonal maximum minus antidiagonal median nondecreasing horizontally and vertically. A254451

Unmatched value maps: number of 2 X n binary arrays indicating the locations of corresponding elements not equal to any horizontal or antidiagonal neighbor in a random 0..1 2 X n array. A218843