Properties of the Number 27840

Twenty-Seven Thousand Eight Hundred Forty

Basics

Value: 27839 → 27840 → 27841

Parity: even

Prime: No

Previous Prime: 27827

Next Prime: 27847

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 ⁶ × 3 × 5 × 29

Divisors: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110110011000000

Octal: 66300

Duodecimal: 14140

Hexadecimal: 6cc0

Square: 775065600

Square Root: 166.85322891691368

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

Triangle of polynomial coefficients related to the series expansions of (1-x)^(-1-2·n/2). A161198

a(n) = binomial(n,4) + binomial(n,2). A55795

a(n) = ∏_k>=0 (1 + floor(n/2^k)). A132269

Square array A(n,k) = A326128(A388981(n, k)), read by descending antidiagonals. A388988

Triangle T(n, k) = binomial(n, k) * A000085(n-k), 0 <= k <= n. A111062

a(n) = 8·a(n-1) + 56·a(n-2), n > 2; a(0)=1, a(1)=1, a(2)=15. A155000

Values of φ(k) when φ(k) = φ(k+1). A3275

Expansion of ψ(q²) / f(-q)² in powers of q where ψ(), f() are Ramanujan θ functions. A137829

Numbers with prime factorization pqrs⁶. A190292

Numbers k such that 2^k - 1 is divisible by (k-1). A87965