Properties of the Number -1080

Eighty

Basics

Value: -1081 → -1080 → -1079

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 9

Digital Root: 9

Palindrome: No

Factorization: 2 ³ × 3 ³ × 5

Divisors: 1, 2, 3, 4, 5, 6, 8, 9, 10, 12

Polygonal

Triangular: No

Square: No

Pentagonal: Yes

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10000111000

Octal: -2070

Duodecimal: -760

Hexadecimal: -438

Square: 1166400

Square Root: 32.863353450309965

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

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

Expansion of η(q)⁵ * η(q³) * η(q⁶)⁴ / η(q²)⁴ in powers of q. A214262

Inverse binomial transform of {1, primes}. A30016

Expansion of k/(4·q^1/2) in powers of q, where k defined by sqrt(k) = theta₂(0, q)/theta₃(0, q). A1938

Irregular triangle read by rows: mean version of Girard-Waring formula A210258, for m = 3 data values. A287768

Expansion of g.f. 1+x+(1+3·x+x²)/(1+x)³. A201163

G.f.: q-Cosh(x,q)² - q-Sinh(x,q)² at q=-x. A198199

Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of 1/sqrt(1 + 2·k*x + k*(k+4)*x²). A307819

Ferromagnetic susceptibility series for f.c.c. lattice. A2924

McKay-Thompson series of class 16d for the Monster group. A82304