Properties of the Number 63440

Sixty-Three Thousand Four Hundred Forty

Basics

Value: 63439 → 63440 → 63441

Parity: even

Prime: No

Previous Prime: 63439

Next Prime: 63443

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 ⁴ × 5 × 13 × 61

Divisors: 1, 2, 4, 5, 8, 10, 13, 16, 20, 26

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111011111010000

Octal: 173720

Duodecimal: 30868

Hexadecimal: f7d0

Square: 4024633600

Square Root: 251.87298386289865

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

Coefficients in the expansion of C²/B¹⁰, in Watson's notation of page 106. A160458

Expansion of ∏_k>=1 ((1+x^k)/(1-x^k))^Fibonacci(k). A260916

Numbers k such that sopf(k) + 1 = sopf(k+1), where sopf(k) = A008472(k). A64111

Number of 5-step knight's tours on an (n+2) X (n+2) board summed over all starting positions. A186854

Numbers k such that s(k) = s(k+1), where s(k) is A059975. A327250

Number of n-step walks from one of the vertices with degree 3 to itself on the four-vertex diamond graph. A344261

a(n) = ∑_k=1..n φ(k) * (floor(n/k)⁴ - floor((n-1)/k)⁴). A344600

Stirling2 transform of [2,3,3,3,3,3,3,3,...]. A60996

Numbers k such that k and k² use only the digits 0, 2, 3, 4 and 6. A136883

Number of open knight's tour diagrams of a 3 X n chessboard that are symmetric under 180-degree rotation and have "type F": the endpoints occur in different columns and agree in color with the cells in the nearest corner. A169774