Properties of the Number 28069

Twenty-Eight Thousand Sixty-Nine

Basics

Value: 28068 → 28069 → 28070

Parity: odd

Prime: Yes

Previous Prime: 28057

Next Prime: 28081

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 28069

Divisors: 1, 28069

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 110110110100101

Octal: 66645

Duodecimal: 142B1

Hexadecimal: 6da5

Square: 787868761

Square Root: 167.53805537847214

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

Doubly balanced primes: primes which are averages of both their immediate and their second neighbors. A51795

Numerators of b(n) = (1/16ⁿ)*(4/(8·n+1) - 2/(8·n+4) - 1/(8·n+5) - 1/(8·n+6)). A48581

Primes p such that p-12, p and p+12 are consecutive primes. A53072

Balanced primes of order one ending in 9. A303095

Number of n-step spirals on hexagonal lattice. A6777

P(n,k) is an array read by rows, with n > 0 and k=1..5, where row n gives the chain of 5 consecutive primes {p(i), p(i+1), p(i+2), p(i+3), p(i+4)} having the symmetrical property p(i) + p(i+4) = p(i+1) + p(i+3) = 2·p(i+2) for some index i. A267028

Numbers k such that the continued fraction for sqrt(k) has period 65. A20404

Primes p such that the sum of the digits of p is not prime, but the sum of each digit raised to the 4th power is prime. A91368

Primes arising in A073946. A113943

Primes p such that 2·p + 31 is a square. A269786