Properties of the Number 28428

Twenty-Eight Thousand Four Hundred Twenty-Eight

Basics

Value: 28427 → 28428 → 28429

Parity: even

Prime: No

Previous Prime: 28411

Next Prime: 28429

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 ² × 3 × 23 × 103

Divisors: 1, 2, 3, 4, 6, 12, 23, 46, 69, 92

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110111100001100

Octal: 67414

Duodecimal: 14550

Hexadecimal: 6f0c

Square: 808151184

Square Root: 168.606049713526

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

T(n,k)=Number of length n+2 0..k arrays with the sum of medians of adjacent triples multiplied by some arrangement of +-1 equal to zero. A253129

Coefficients in the expansion of C/B², in Watson's notation of page 106. A160461

Triangle read by rows. T(n, k) = k! * BellPolynomial(n, k). A350258

Number of cubes of primes <= 2ⁿ. A60969

a(n) is the number of terms less than A276086(n) in the range of A276086, where A276086 is the primorial base exp-function. A376411

a(n) = 2^{-1 + (n + n mod 2}/2)*abs(permanent(M_n)) where M_n is the n X n matrix M_n(j, k) = cos(π*j·k/n) if n >= 1 and a(0) = 1. A347929

Numbers k such that k + sopfr(k) is a fourth power. A387246

Values of m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,11. A64242

Number of length n+2 0..4 arrays with the sum of medians of adjacent triples multiplied by some arrangement of +-1 equal to zero. A253125

Number of length 5+2 0..n arrays with the sum of medians of adjacent triples multiplied by some arrangement of +-1 equal to zero. A253133