Properties of the Number 9428

Nine Thousand Four Hundred Twenty-Eight

Basics

Value: 9427 → 9428 → 9429

Parity: even

Prime: No

Previous Prime: 9421

Next Prime: 9431

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 2357

Divisors: 1, 2, 4, 2357, 4714, 9428

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10010011010100

Octal: 22324

Duodecimal: 5558

Hexadecimal: 24d4

Square: 88887184

Square Root: 97.09788875150684

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

Discriminants of imaginary quadratic fields with class number 42 (negated). A351680

a(n) = 4·5ⁿ - 3·4ⁿ. A257285

Numbers whose square starts with 4 identical digits. A132391

Triangle T(n,m) by rows: The number of tatami tilings of a 2 X n grid with dimers and 2·m monomers. A272471

a(n) = [xⁿ] ((∑_k=0..n (k+7)!*x^k)/(∑_k=0..n (k+7)!*(-x)^k))^1/8. A303569

Positions of peak values in A232221. A232359

a(n)² is smallest square number starting with a string of n 8's. A34992

a(n) = n*(n+1) + (n+2)*(n+3) + (n+4)*(n+5) + (n+6)*(n+7). A217776

Numbers whose square starts with exactly 4 identical digits. A346940

a(1) = 1; a(n) = ∑_k=2..n (-1)^k * k² * a(floor(n/k)). A361981