Properties of the Number -640233

Six Hundred Forty Thousand Two Hundred Thirty-Three

Basics

Value: -640234 → -640233 → -640232

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 11 × 29 × 223

Divisors: 1, 3, 9, 11, 29, 33, 87, 99, 223, 261

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10011100010011101001

Octal: -2342351

Duodecimal: -26A609

Hexadecimal: -9c4e9

Square: 409898294289

Square Root: 800.1456117482618

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

a(n) = ∑_k=0..n binomial(k+7,7) * binomial(k,n-k)². A377159

G.f.: (1+x²)/((1-2x)(1-x-x²)); a(n)=3a(n-1)-a(n-2)-2a(n-3); a(n)=5·2ⁿ-L(n+3); a(n)=sum{k=0..n, (L(k)-0^k)2^n-k}. A99166