Properties of the Number 86828

Eighty-Six Thousand Eight Hundred Twenty-Eight

Basics

Value: 86827 → 86828 → 86829

Parity: even

Prime: No

Previous Prime: 86813

Next Prime: 86837

Digit Sum: 32

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 7 ² × 443

Divisors: 1, 2, 4, 7, 14, 28, 49, 98, 196, 443

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10101001100101100

Octal: 251454

Duodecimal: 422B8

Hexadecimal: 1532c

Square: 7539101584

Square Root: 294.6659125178886

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

Discriminants of totally real cubic fields with 3 associated nonconjugate fields. A329787

Number of (w,x,y,z) with all terms in {1,...,n} and w+x>=2y+2z. A212565

Number of n X 2 arrays of the minimum value of corresponding elements and their horizontal or vertical neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..2 n X 2 array. A219167

Number of 2-ascent sequences of length n with no consecutive repeated letters. A263852

Half the number of length n integer sequences with sum zero and sum of squares 50. A157537

Number of length n+2 0..5 arrays with no consecutive three elements summing to more than 5. A241611

Number of length 7+2 0..n arrays with no consecutive three elements summing to more than n. A241622

T(n,k)=Number of length n+2 0..k arrays with no consecutive three elements summing to more than k. A241619

a(1) = 0, a(2) = 1, a(3) = 1, a(4) = 7; thereafter, a(n) = a(n-1) + (n-1)*a(n-2). A86828