Properties of the Number -163840

One Hundred Sixty-Three Thousand Eight Hundred Forty

Basics

Value: -163841 → -163840 → -163839

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 ¹⁵ × 5

Divisors: 1, 2, 4, 5, 8, 10, 16, 20, 32, 40

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101000000000000000

Octal: -500000

Duodecimal: -7A994

Hexadecimal: -28000

Square: 26843545600

Square Root: 404.7715405015526

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: Yes

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

Triangle T, read by rows, where matrix power T² has powers of 2 in the secondary diagonal: [T²](n+1,n) = 2ⁿ⁺¹, with all 1's in the main diagonal and zeros elsewhere. A117250

G.f. defined as the limit: A(x) = lim_n->oo F(n)^{1/4^(n-1}) where F(n) is the n-th iteration of: F(0) = 1, F(n) = F(n-1)⁴ + (4x)^(4ⁿ-1/3) for n >= 1. A101193

a(n) = 5·2ⁿ. A20714

Numbers of the form 2^k times 1, 3 or 5. A29747

First differences of A045623. A45891

16-almost primes (generalization of semiprimes). A69277

Numbers of form 4ⁱ*10^j, with i, j >= 0. A25621

Numbers of the form 2^k or 5·2^k. A94958

Binary expansion is 1x100...0 where x = 0 or 1. A70875

Expansion of g.f.: (1+x²)/(1-2·x). A84215