Properties of the Number 30685

Thirty Thousand Six Hundred Eighty-Five

Basics

Value: 30684 → 30685 → 30686

Parity: odd

Prime: No

Previous Prime: 30677

Next Prime: 30689

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 5 × 17 × 19 ²

Divisors: 1, 5, 17, 19, 85, 95, 323, 361, 1615, 1805

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 111011111011101

Octal: 73735

Duodecimal: 15911

Hexadecimal: 77dd

Square: 941569225

Square Root: 175.17134468856486

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

Unary-binary representation of Stern polynomials: a(n) = A156552(A260443(n)). A277020

Numbers k such that sopfr(k + sopfr(k)) = sopfr(k) + sopfr(sopfr(k)), where sopfr = A001414. A376851

Odd bisection of A277020: a(n) = A277020(2n+1). A277189

Number of walks from (0,0) to (n,n) in the region 0 <= x-y <= 3 with the steps (1,0), (0, 1), (2,0) and (0,2). A127617

In triangular peg solitaire, number of distinct feasible pairs starting with one peg missing and finishing with one peg. A130515

a(n) = K₃(n) = ∑_k>=0 A090285(3,k)*2^k*binomial(n,k). a(n) = (4·n³+30·n²+56·n+15)/3. A90294

In triangular peg solitaire, number of distinct solvable feasible pairs starting with one peg missing and finishing with one peg. A130516

a(n) = (4·n+9)*n². A258618

Numbers whose base-4 representation contains exactly four 1's and four 3's. A45133

Numbers k such that k-th Catalan number C(2k,k)/(k+1) is divisible by k. A14847