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Properties of the Number 28621

Twenty-Eight Thousand Six Hundred Twenty-One

Basics

Value: 28620 → 28621 → 28622

Parity: odd

Prime: Yes

Previous Prime: 28619

Next Prime: 28627

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 28621

Divisors: 1, 28621

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110111111001101

Octal: 67715

Duodecimal: 14691

Hexadecimal: 6fcd

Square: 819161641

Square Root: 169.17742166140255

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

Primes from merging of 5 successive digits in decimal expansion of the Golden Ratio, (1+sqrt(5))/2. A103809
Primes p whose period of reciprocal equals (p-1)/9. A56214
Primes from merging of 5 successive digits in decimal expansion of Euler-Mascheroni constant. A198779
Primes of the form p = prime(k+1) such that prime(k) = (prime(k+3)+prime(k-1))/2. A126239
Number of (w,x,y) with all terms in {0,...,n} and |w-x|+|x-y|+|y-w| <= w+x+y. A213487
Row sums of triangle A091499, in which A091499(n,k) equals the k-th term of the convolution of the two prior rows indexed by (n-k) and (k-1). A91501
Primes from merging of 5 successive digits in decimal expansion of the Euler-Mascheroni Constant. A104939
Primes p such that both 2p-1 and 2p2-2p+1 are prime. A274609
Solution of the complementary equation a(n) = a(0)*b(n-1) + a(1)*b(n-2) + ... + a(n-1)*b(0) + n, where a(0) = 1, a(1) = 3, b(0) = 2, and (a(n)) and (b(n)) are increasing complementary sequences. A296225
Number of binary arrays indicating the locations of trailing edge maxima of a random length-n 0..7 array extended with zeros and convolved with 1,-2,1. A222152