Properties of the Number -8780

Seven Hundred Eighty

Basics

Value: -8781 → -8780 → -8779

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 5 × 439

Divisors: 1, 2, 4, 5, 10, 20, 439, 878, 1756, 2195

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10001001001100

Octal: -21114

Duodecimal: -50B8

Hexadecimal: -224c

Square: 77088400

Square Root: 93.70165420097983

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) = n*(11·n - 1)/2. A22268

Sum of the squared parts of the partitions of n into exactly two parts. A226141

Digitally balanced numbers in base 6: equal numbers of 0's, 1's, ..., 5's. A49357

Nonnegative values·of solutions (x, y) to the Diophantine equation x²+(x+439)² = y². A130645

a(n) is the minimum total surface area of four-element sets of distinct integer-sided cuboids that fill an n X n X n cube. A392884

5 times centered pentagonal numbers: 5*(5·n² + 5·n + 2)/2. A164015

Number of (w,x,y,z) with all terms in {1,...,n} and |w-x|=w+|y-z|. A212685

Difference between larger and smaller term of n-th ψ-amicable pair, sorted by the smaller members from A323329. A387643

Numbers in which 0,1,2,3,4,5 all occur in base 6. A31947

a(n) = Sum[Sum[(i+j)!/i!/j!,{i,1,j}],{j,1,n}]. A120279