Properties of the Number 27380

Twenty-Seven Thousand Three Hundred Eighty

Basics

Value: 27379 → 27380 → 27381

Parity: even

Prime: No

Previous Prime: 27367

Next Prime: 27397

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ² × 5 × 37 ²

Divisors: 1, 2, 4, 5, 10, 20, 37, 74, 148, 185

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 110101011110100

Octal: 65364

Duodecimal: 13A18

Hexadecimal: 6af4

Square: 749664400

Square Root: 165.46903033498444

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

Numbers k such that lcm(1,2,3,...,k)/13 equals the denominator of the k-th harmonic number H(k). A112818

Numbers n such that there is no square n-gonal number greater than 1. A188896

a(n) = 20·n². A195322

T(n,k)=1/24 the number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock containing exactly three distinct values. A183594

Numbers which are the sum of their proper divisors containing the digit 6. A59465

Triangle T(n,k) read by rows of number of ways k domicules can be placed on an n X n square (n >= 0, 0 <= k <= floor(n²/2)). A243424

G.f.: A(x) = ∏_n>=1 1/(1 - 4ⁿ*xⁿ)^4/4ⁿ; self-convolution of A110156. A110154

Practical numbers z such that z² = x² + y² for some practical numbers·and y with gcd(x,y,z) = 4. A294112

a(0) = 1, a(n) = 18·n² + 2 for n>0. A10008

Sides of integer Heronian triangles [prime(A068964(n)), prime(A068964(n)+1), a(n)] with area A068966(n). A68965