Properties of the Number 28230

Twenty-Eight Thousand Two Hundred Thirty

Basics

Value: 28229 → 28230 → 28231

Parity: even

Prime: No

Previous Prime: 28229

Next Prime: 28277

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 5 × 941

Divisors: 1, 2, 3, 5, 6, 10, 15, 30, 941, 1882

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110111001000110

Octal: 67106

Duodecimal: 14406

Hexadecimal: 6e46

Square: 796932900

Square Root: 168.01785619391768

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

Numbers k such that 4·k-1, 8·k-1, 16·k-1 and 32·k-1 are all primes. A101794

Smallest of first string of exactly 2n-1 consecutive composite integers. A45881

T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000101 or 00010001. A260177

First subsequent, disjoint occurrence of n consecutive nonprimes. A60064

Positions of hexagonal pyramidal numbers in the EKG sequence. A144080

a(n) = 36·n² + 6. A158479

Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 56. A31734

Number of (n+2) X (1+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00000001 00000101 or 00010001. A260170

a(n) is the smallest positive integer that begins a run of exactly 2·n-1 consecutive integers having at least 4 divisors each. A340735

Squarefree integers k such that x⁴ - k·y² = 1 has a nontrivial solution. A356496