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Properties of the Number -406980

Four Hundred Six Thousand Nine Hundred Eighty

Basics

Value: -406981 → -406980 → -406979

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 2 2 × 3 2 × 5 × 7 × 17 × 19

Divisors: 1, 2, 3, 4, 5, 6, 7, 9, 10, 12

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8109 Try Today's Challenge

Representations

Binary: -1100011010111000100

Octal: -1432704

Duodecimal: -177630

Hexadecimal: -635c4

Square: 165632720400

Square Root: 637.9498412884825

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) = lcm{1,2,...,n} / swingingfactorial(n) = A003418(n) / A056040(n). A180000
Number of internal triangles in all triangulations of an (n+1)-gon. A2058
Number of ways to place 3 points on a triangular grid of side n so that they are not vertices of an equilateral triangle of any orientation. A240440
Triangle T(n,k) read by rows: coefficients of polynomials Pn(t) defined in Formula section. A286785
a(n) = LCM(binomial(n,0), ..., binomial(n,n)) / binomial(n,floor(n/2)). A48619
a(n) = lcm{1, ..., 2n} / binomial(2n, n). A68550
Triangle read by rows: T(n,k) is the number of noncrossing forests with n vertices and k components (1<=k<=n). A94021
a(n) = lcm{1,2,...,n} / binomial(n,floor(n/2)). A263673
Expansion of (∑k>=0 xk4)19. A282288
Triangle read by rows: T(n,k) is the number of noncrossing forests with n vertices and k edges. A94040