Properties of the Number 78530

Seventy-Eight Thousand Five Hundred Thirty

Basics

Value: 78529 → 78530 → 78531

Parity: even

Prime: No

Previous Prime: 78517

Next Prime: 78539

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 × 5 × 7853

Divisors: 1, 2, 5, 10, 7853, 15706, 39265, 78530

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 10011001011000010

Octal: 231302

Duodecimal: 39542

Hexadecimal: 132c2

Square: 6166960900

Square Root: 280.2320467041555

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 3-step one space for components leftwards or up, two space for components rightwards or down asymmetric quasi-queen's tours (antidiagonal moves become knight moves) on an n X n board summed over all starting positions. A187858

Numbers k such that σ(φ(k)) - φ(k) = φ(σ(k)), where φ(k) is the Euler totient function of k and σ(k) is the sum of the divisors of k. A271633

Consider the 2^n-1 monic polynomials f(x) with coefficients 0 or 1, degree n and f(0)=1. Sequence gives triangle read by rows, in which T(n,k) (n>=1) is the number of such polynomials of thickness k (2 <= k <= n+1). A169940

Bilinear recursive sequence. A78530