Properties of the Number -44

Forty-Four

Basics

Value: -45 → -44 → -43

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 8

Digital Root: 8

Palindrome: Yes

Factorization: 2 ² × 11

Divisors: 1, 2, 4, 11, 22, 44

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101100

Octal: -54

Duodecimal: -38

Hexadecimal: -2c

Square: 1936

Square Root: 6.6332495807108

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

a(n) = 2 - n. A22958

a(n) = (n+1)*(2-n)/2. A80956

Triangle read by rows: T(n,k) = T(n-1,k-1) + T(n-1,k), 0 < k < n with T(n,0) = n and T(n,n) = -n. A214292

Dirichlet inverse of σ function (A000203). A46692

a(n) = (-1)ⁿ⁺¹ * n. A181983

Generalized Stirling number triangle of first kind read by rows: T(n, k) = [x^k] ∏_m=1..n (x - m - r), with r = 1. A49444

Riordan array ((1-2x)/(1-x), x/(1-x)). A112467

Expansion of (∏_j>=1 (1-(-x)^j) - 1)¹¹ in powers of x. A47649

Numerators of table a(n,k) read by antidiagonals: a(0,k) = 1/(k+1), a(n+1,k) = (k+1)*(a(n,k) - a(n,k+1)), n >= 0, k >= 0. A51714

a(n) = ∑_k=1..n μ(k)*k, where μ(k) is the Moebius function. A68340