Properties of the Number -1672

Six Hundred Seventy-Two

Basics

Value: -1673 → -1672 → -1671

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ³ × 11 × 19

Divisors: 1, 2, 4, 8, 11, 19, 22, 38, 44, 76

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11010001000

Octal: -3210

Duodecimal: -B74

Hexadecimal: -688

Square: 2795584

Square Root: 40.890096600521744

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

Let A(0) = 1, B(0) = 0 and C(0) = 0. Let A(n+1) = - ∑_{k = 0..n} binomial(n,k)*C(k), B(n+1) = ∑_{k = 0..n} binomial(n,k)*A(k) and C(n+1) = ∑_{k = 0..n} binomial(n,k)*B(k). This entry gives the sequence B(n). A143631

a(n) = -(1/120)*n*(n - 3)*(n - 6)*(n² - 21·n + 8). A319931

Expansion of ∏_k>=1 (1 - x^k)²². A10828

Expansion of ∏_k>=1 (1 + x^3·k)^3·k / (1 + x^k)^k. A285294

Expansion of ∑_k>0 k² * x^k/(1 + x^k)³. A364351

A triangular sequence from a Beraha type recursive polynomial using 5 X 5 centered tridiagonal matrices with chromatic polynomial central roots to its characteristic polynomial. A123969

Balanced numbers: numbers k such that φ(k) (A000010) divides σ(k) (A000203). A20492

a(n) = n*(n + 6). A28560

Numerator of 1/9 - 1/n². A61039

Numbers that can be expressed as the difference of the squares of primes in just one distinct way. A90781