Properties of the Number 27906

Twenty-Seven Thousand Nine Hundred Six

Basics

Value: 27905 → 27906 → 27907

Parity: even

Prime: No

Previous Prime: 27901

Next Prime: 27917

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 4651

Divisors: 1, 2, 3, 6, 4651, 9302, 13953, 27906

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110110100000010

Octal: 66402

Duodecimal: 14196

Hexadecimal: 6d02

Square: 778744836

Square Root: 167.05089044958726

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

Barely abundant numbers: abundant n such that σ(n)/n < σ(m)/m for all abundant numbers m<n, σ(n) being the sum of the divisors of n. A71927

a(n) = nⁿ - n*(n-1)^n-1. A60226

Row sums of A163233 and A163235. A163242

Triangle read by rows: T(n,k) (1 <= k <= n) defined by T(n,n) = (n-1)^n-1, T(n,k) = T(n,k+1) - (n-1)*T(n-1,k) for k = n-1 .. 1. A241580

Dying rabbits: a(n) = a(n-1) + a(n-2) - a(n-7). A23437

Number of 4 X n 0..1 arrays with no element equal to more than two of its horizontal, diagonal or antidiagonal neighbors and with new values introduced in order 0 sequentially upwards. A281472

Expansion of ∏_m>=1 (1+q^m)^4·m. A27906

Series reversion of x + x² + x³ + x⁴ + x⁵. A217365