Properties of the Number 11978

Eleven Thousand Nine Hundred Seventy-Eight

Basics

Value: 11977 → 11978 → 11979

Parity: even

Prime: No

Previous Prime: 11971

Next Prime: 11981

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 × 53 × 113

Divisors: 1, 2, 53, 106, 113, 226, 5989, 11978

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10111011001010

Octal: 27312

Duodecimal: 6B22

Hexadecimal: 2eca

Square: 143472484

Square Root: 109.4440496326776

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

Array read by antidiagonals: T(m,n) is the number of matchings in the stacked prism graph C_m X P_n. A287428

Number of ways to cut an n X n square into squares with integer sides, reduced for symmetry, where the orbits under the symmetry group of the square, D4, have 2 elements. A226979

Expansion of ∏_k>=1 (1 + x^3·k-1)^3·k-1. A262948

Composite squarefree numbers n such that p-d(n) divides n-d(n), where p are the prime factors of n and d(n) the number of divisors of n. A228300

Coordination sequence for Cr3Si, Si position. A9927

Denominators of Egyptian fraction for π-3 whose partial sums are the convergents. A156618

Number of matchings in graph C₃ X P_n. A33515

a(n) is the start of the first arithmetic progression with common difference n of n numbers with the same prime signature. A87306

Coefficient array of orthogonal polynomials P(n,x)=(x-n)*P(n-1,x)-(n-1)²*P(n-2,x), P(0,x)=1, P(1,x)=x-1. A182823

a(n) = 9·11ⁿ - 1. A199029