Properties of the Number 78820

Seventy-Eight Thousand Eight Hundred Twenty

Basics

Value: 78819 → 78820 → 78821

Parity: even

Prime: No

Previous Prime: 78809

Next Prime: 78823

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 ² × 5 × 7 × 563

Divisors: 1, 2, 4, 5, 7, 10, 14, 20, 28, 35

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10011001111100100

Octal: 231744

Duodecimal: 39744

Hexadecimal: 133e4

Square: 6212592400

Square Root: 280.7489982172688

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) = 20·C(2n,n)*(2n+1)/(n+4). A78820

G.f. A(x) satisfies: ∏_n=-oo..+oo 1 + xⁿ*(1 + A(x)ⁿ)ⁿ = 4. A294474