Properties of the Number 28050

Twenty-Eight Thousand Fifty

Basics

Value: 28049 → 28050 → 28051

Parity: even

Prime: No

Previous Prime: 28031

Next Prime: 28051

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 5 ² × 11 × 17

Divisors: 1, 2, 3, 5, 6, 10, 11, 15, 17, 22

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110110110010010

Octal: 66622

Duodecimal: 14296

Hexadecimal: 6d92

Square: 786802500

Square Root: 167.48134224444226

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 that raised to the powers from 1 to k (with k>=1) are multiple of the sum of their digits (n raised to k+1 must not be a multiple). Case k=10. A135195

Numbers n such that n!10-1 is prime. A204658

Unitary practical numbers that are nonsquarefree. A287173

a(n) = ∑_{k=0..floor(n/5)} binomial(n+4,5·k+4) * Catalan(k). A360047

Number of labeled trees of diameter 3 with n nodes. A554

Alexandrian integers: numbers of the form n = p·q*r such that 1/n = 1/p - 1/q - 1/r for some integers p,q,r. A147811

Irregular table: the n-th row polynomial is given by the formal power series expansion of ∑_{k >= 0} (1 + q)^{n·k + n²}*∏_{j = 1..k} (1 - (1 + q)^2·j-1), n >= 1. A340882

A symmetric triangle, with sum the large Schröder numbers. A175124

a(n) = 3*(9·n - 1)*(3·n - 2). A277985

Triangle read by rows, T(n, k) = binomial(n, k) * k! * Stirling2(n-k, k), for n >= 0 and 0 <= k <= n//2, where '//' denotes integer division. A362369