Properties of the Number 28270

Twenty-Eight Thousand Two Hundred Seventy

Basics

Value: 28269 → 28270 → 28271

Parity: even

Prime: No

Previous Prime: 28229

Next Prime: 28277

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 × 5 × 11 × 257

Divisors: 1, 2, 5, 10, 11, 22, 55, 110, 257, 514

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110111001101110

Octal: 67156

Duodecimal: 1443A

Hexadecimal: 6e6e

Square: 799192900

Square Root: 168.13684902483453

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

Triangle T(n, k, q) = ∑_j=0..10 q^j * floor( binomial(n+1,k)*binomial(n-1,k-1)/(2^j*(n+1)) ) for q = 3, read by rows. A174045

Number of pairs (p,q) of partitions of n such that the set of parts in q is a proper subset of the set of parts in p. A369910

Consider a number n with m decimal digits. The sequence lists the numbers n having the prefix of length m-1 in the middle of the decimal expansion of prime(n). A242956

Expansion of ∏_k>=1 (1 - x^k)^Fibonacci(k). A357179

a(n) = a(n-1) + a(n - 1 minus the number of terms of a(k) == (mod 6) so far). A60733

a(n) = a(n-1)+4·a(n-2)-4·a(n-4). A107385

Numbers k such that 7·10^k + 61 is prime. A281989

a(n) = ((p-1)ⁿ + (p+1)ⁿ) mod p², where p is the n-th prime. A379544

Central elements in 3-Pascal triangle A028262 (by row). A28270