Properties of the Number 28886

Twenty-Eight Thousand Eight Hundred Eighty-Six

Basics

Value: 28885 → 28886 → 28887

Parity: even

Prime: No

Previous Prime: 28879

Next Prime: 28901

Digit Sum: 32

Digital Root: 5

Palindrome: No

Factorization: 2 × 11 × 13 × 101

Divisors: 1, 2, 11, 13, 22, 26, 101, 143, 202, 286

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 111000011010110

Octal: 70326

Duodecimal: 14872

Hexadecimal: 70d6

Square: 834400996

Square Root: 169.95881854143374

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

Numbers n such that n!3 + 3¹⁰ is prime, where n!3 = n!!! is a triple factorial number (A007661). A261145

Sequence is {a(6,n)}, where a(m,n) is defined at sequence A110665. A110671

Triangle read by rows: T(n,k) (0<=k<=n) given by T(n,0)=1, T(n,n) = binomial(2n,n); otherwise T(n,k) = T(n,k-1)+T(n-1,k). A274292

a(n) = ∑_i=1..n ∑_j=1..n ∑_k=1..n φ(i·j*k) / φ(j·k). A372663

Expansion of ∏_k>=1 1/(1 - x^k*(k+1/2))^A072964(k). A321507

a(1) = 1, a(2) = 2. For n >= 3, a(n) is found by concatenating the fourth powers of the first n-1 terms of the sequence and then dividing the resulting number by a(n-1). A181866

Primes of the form k² - 8. A28886

Number of nX4 0..1 arrays with every element unequal to 2, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero. A305018