Properties of the Number 30890

Thirty Thousand Eight Hundred Ninety

Basics

Value: 30889 → 30890 → 30891

Parity: even

Prime: No

Previous Prime: 30881

Next Prime: 30893

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 × 5 × 3089

Divisors: 1, 2, 5, 10, 3089, 6178, 15445, 30890

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 111100010101010

Octal: 74252

Duodecimal: 15A62

Hexadecimal: 78aa

Square: 954192100

Square Root: 175.75551200460256

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 self-avoiding planar walks starting at (0,0), ending at (n,0), remaining in the first quadrant and using steps (0,1), (1,0), (1,1), (-1,1), and (1,-1) such that (0,1) is never used directly before or after (1,0) or (1,1). A317985

a(n) is the initial transient (converted to base 10), before the periodic part, on the n-th diagonal from the left of rule-30 1-D cellular automaton, when started from a single ON cell, or -1 if there is no transient part. A364241

Second differences of sequence A160644. A160648

a(n) is the position of the first occurrence of n³ in the concatenation of the positive integers in decimal representation. A290787

G.f.: ∑_n>=0 xⁿ * (1 + xⁿ)ⁿ / (1 - x + xⁿ⁺¹)ⁿ⁺¹. A322619

Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 11. A31599

Index k of the first occurrence of A019565(2n-1) as the smallest term that makes prime(k)-A019565(2n-1) prime. A103792

Number of non-isomorphic planar graphs with n edges that are exactly 2-vertex connected and at least 3-edge connected. A393183

[ exp(10/17)*n! ]. A30890