Properties of the Number 30898

Thirty Thousand Eight Hundred Ninety-Eight

Basics

Value: 30897 → 30898 → 30899

Parity: even

Prime: No

Previous Prime: 30893

Next Prime: 30911

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 2 × 7 × 2207

Divisors: 1, 2, 7, 14, 2207, 4414, 15449, 30898

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 111100010110010

Octal: 74262

Duodecimal: 15A6A

Hexadecimal: 78b2

Square: 954686404

Square Root: 175.7782694191748

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 subsets of {1,...,n} containing two elements whose difference is 2. A209398

First differences of (provable) Sierpiński numbers (A076336). A270971

a(n) = ceiling(n*φ¹⁶), where φ is the golden ratio, A001622. A4971

Irregular triangle read by rows: T(n,k) is the number of permutations in S_n having k stretching pairs. A216120

a(n) = round(n*φ¹⁶), where φ is the golden ratio, A001622. A4951

a(n) = (72 - 258·n + 601·n² - 264·n³ + 33·n⁴)/4. A108642

G.f. satisfies: A(x) = ∑_n>=1 (1 + xⁿ)/xⁿ * A(x)^2·n, where A(0)=0 and A'(0)=1. A268297

a(n) = floor(exp(2/17)*n!). A30898