Properties of the Number 85820

Eighty-Five Thousand Eight Hundred Twenty

Basics

Value: 85819 → 85820 → 85821

Parity: even

Prime: No

Previous Prime: 85819

Next Prime: 85829

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 5 × 7 × 613

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

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10100111100111100

Octal: 247474

Duodecimal: 417B8

Hexadecimal: 14f3c

Square: 7365072400

Square Root: 292.9505077653903

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) = 4·n*(floor(n²/2)+1). For n >= 3, this is the number of directed Hamiltonian paths on the n-prism graph. A124350

Number of partitions of n with difference 10 between the number of odd parts and the number of even parts, both counted without multiplicity. A242701

Possible two-digit endings of primes (with leading zeros). A85820

Number of 6 X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 1 1 and 1 0 1 vertically. A207766