Properties of the Number 40646

Forty Thousand Six Hundred Forty-Six

Basics

Value: 40645 → 40646 → 40647

Parity: even

Prime: No

Previous Prime: 40639

Next Prime: 40693

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 × 20323

Divisors: 1, 2, 20323, 40646

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1001111011000110

Octal: 117306

Duodecimal: 1B632

Hexadecimal: 9ec6

Square: 1652097316

Square Root: 201.60853156550692

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 4Xn 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 0 1 0 vertically. A207244

a(n) = ∑_k=1..n binomial(2·k, k) * σ(k). A356344

T(n,k)=Number of nXk 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 0 1 0 vertically. A207242

Continued fraction for sqrt(672). A40646