Properties of the Number 28100

Twenty-Eight Thousand One Hundred

Basics

Value: 28099 → 28100 → 28101

Parity: even

Prime: No

Previous Prime: 28099

Next Prime: 28109

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 2 ² × 5 ² × 281

Divisors: 1, 2, 4, 5, 10, 20, 25, 50, 100, 281

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 110110111000100

Octal: 66704

Duodecimal: 14318

Hexadecimal: 6dc4

Square: 789610000

Square Root: 167.6305461424021

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

a(n) = 5·a(n-1) + 5·a(n-2), n > 2, a(0)=1, a(1)=4, a(2)=24. A155119

Numbers m such that the decimal number concat(8,m) is a square. A273363

Number of fibodd primes (A095081) in range [2ⁿ,2ⁿ⁺¹]. A95061

Output of the linear congruential pseudo-random number generator rand() used in Microsoft's Visual C++. A96558

Row 4 of table A162424. A162427

a(n) = ∑_{p <= n <= q < 2n, p,q prime} (p·q). A352777

Magic sums of 4 X 4 magic squares composed of odd squares. A271582

a(n) = A068346(A276086(n)), where A068346 is the second arithmetic derivative, and A276086 is the primorial base exp-function. A370131

a(n)=n³-(n-1)³-(n-2)³-...-1. A179298

Numbers n such that A118799(n) = 0. A118578