Properties of the Number 87878

Eighty-Seven Thousand Eight Hundred Seventy-Eight

Basics

Value: 87877 → 87878 → 87879

Parity: even

Prime: No

Previous Prime: 87877

Next Prime: 87881

Digit Sum: 38

Digital Root: 2

Palindrome: Yes

Factorization: 2 × 7 × 6277

Divisors: 1, 2, 7, 14, 6277, 12554, 43939, 87878

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10101011101000110

Octal: 253506

Duodecimal: 42A32

Hexadecimal: 15746

Square: 7722542884

Square Root: 296.44223720650876

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

T(n,k) = number of n X k 0..3 arrays with rows, diagonals and antidiagonals unimodal and columns nondecreasing. A224173

Number of n X 3 0..3 arrays with rows, diagonals and antidiagonals unimodal and columns nondecreasing. A224168

Number of 5 X n 0..3 arrays with rows, diagonals and antidiagonals unimodal and columns nondecreasing. A224176

Numbers k such that k and k² use only the digits 2, 4, 5, 7 and 8. A137097

T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with every 2X2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically. A258554

Number of (n+2) X (6+2) 0..1 arrays with no 3·3 subblock diagonal sum less than the antidiagonal sum or central row sum less than the central column sum. A258892

a(n) = one of five triples of directions in n-th triple of moves in the optimal solution of the Tower of Hanoi; it is a squarefree sequence over a five-letter alphabet. A45898

Primes of the form (4n+3)² + (4m)², m,n = 0,1,2.. A87878