Properties of the Number 40086

Forty Thousand Eighty-Six

Basics

Value: 40085 → 40086 → 40087

Parity: even

Prime: No

Previous Prime: 40063

Next Prime: 40087

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ² × 17 × 131

Divisors: 1, 2, 3, 6, 9, 17, 18, 34, 51, 102

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1001110010010110

Octal: 116226

Duodecimal: 1B246

Hexadecimal: 9c96

Square: 1606887396

Square Root: 200.214884561563

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

Integers having ideal digital mean up to base 5. A144800

Numbers k such that k divides prime(k) + prime(k+1). A66895

Numbers k that divide the average of prime(k) and prime(k+1). A66706

a(n) = f(f(f(f(f(n))))), where f(n) is prime(n)-1. A141139

Values of m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,25. A64249

Numbers k such that prime(k+1)² == prime(k)² (mod k). A67783

a(n) = prime(prime(prime(prime(prime(prime(n)-1)-1)-1)-1)-1)-1, where prime(n) is the n-th prime. A141185

a(n) = prime(prime(prime(prime(n) - 1) - 1) - 1) - 1, where prime(n) is the n-th prime. A141217

Insert a dot after the first digit of a(n); this is now the beginning of the arithmetic mean of the digits used so far in the sequence. Lexicographically earliest sequence of distinct positive terms with this property. A335744

Primes p such that x³ = 20 has no solution mod p. A40086