Properties of the Number 30905

Thirty Thousand Nine Hundred Five

Basics

Value: 30904 → 30905 → 30906

Parity: odd

Prime: No

Previous Prime: 30893

Next Prime: 30911

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 5 × 7 × 883

Divisors: 1, 5, 7, 35, 883, 4415, 6181, 30905

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111100010111001

Octal: 74271

Duodecimal: 15A75

Hexadecimal: 78b9

Square: 955119025

Square Root: 175.79817974029197

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

Number of pairs (λ,μ) of partitions λ of n and μ of six with μ <= λ (by diagram containment). A303856

a(n) = (2·F(3·n) - F(n))/3, where F=A000045 (the Fibonacci sequence). A49675

Take an n X n square grid of points in the plane; a(n) = number of non-isomorphic ways to divide the points into two sets using a straight line. A116696

9ⁿ mod 2ⁿ. A138998

Number of integer partitions of n such that the product of parts is greater than the sum of primes indexed by the parts. A380411

a(n) is the smallest k such that k!'s prime(n)-smooth part is less than its prime(n+1)-rough part. A360316

[ exp(5/16)*n! ]. A30905