Properties of the Number -43648

Forty-Three Thousand Six Hundred Forty-Eight

Basics

Value: -43649 → -43648 → -43647

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 ⁷ × 11 × 31

Divisors: 1, 2, 4, 8, 11, 16, 22, 31, 32, 44

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1010101010000000

Octal: -125200

Duodecimal: -21314

Hexadecimal: -aa80

Square: 1905147904

Square Root: 208.92103771520954

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

If X₁, ..., X_n is a partition of a 2n-set X into 2-blocks then a(n) is equal to the number of 3-subsets of X containing none of X_i, (i=1,...,n). A130809

Abundance of A181595(n). A181596

T(n,k)=Number of nXk 0..4 arrays with no element equal to the sum of elements to its left or the sum of the elements above it, modulo 5. A239194

G.f. A(x) satisfies A(x) = 1 / (1 - x - x·A(x⁵)). A367661

Irregular triangle read by rows: coefficients of polynomials related to a family of convolutions of certain central binomial sequences. A142961

Starts of runs of 4 consecutive integers that are all s-practical numbers (A393492). A393495

A Jacobsthal convolution. A113726

a(n) = ((2+sqrt(5))*(3+sqrt(5))ⁿ + (2-sqrt(5))*(3-sqrt(5))ⁿ)/2. A162771

a(1) = 17, a(2) = 80, a(n) = 4*(a(n-1) + a(n-2)) for n >= 3. A228602

Bisection of A002470. A2287