Properties of the Number 78891

Seventy-Eight Thousand Eight Hundred Ninety-One

Basics

Value: 78890 → 78891 → 78892

Parity: odd

Prime: No

Previous Prime: 78889

Next Prime: 78893

Digit Sum: 33

Digital Root: 6

Palindrome: No

Factorization: 3 × 26297

Divisors: 1, 3, 26297, 78891

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011010000101011

Octal: 232053

Duodecimal: 397A3

Hexadecimal: 1342b

Square: 6223789881

Square Root: 280.87541722265405

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

Number of (n+2)X(7+2) 0..4 arrays with every consecutive three elements in every row and column not having exactly two distinct values, and in every diagonal and antidiagonal having exactly two distinct values, and new values 0 upwards introduced in row major order. A252810

a(n) = Sum{j₁ + ... + j_n = n} ∑_k=1..n k·C(n-1,k-1), where the outer sum is over all partitions of n. A84362

T(n,k)=Number of (n+2)X(k+2) 0..4 arrays with every consecutive three elements in every row and column not having exactly two distinct values, and in every diagonal and antidiagonal having exactly two distinct values, and new values 0 upwards introduced in row major order. A252811

Concatenate first n triangular numbers in reverse order. A78891