Properties of the Number 28426

Twenty-Eight Thousand Four Hundred Twenty-Six

Basics

Value: 28425 → 28426 → 28427

Parity: even

Prime: No

Previous Prime: 28411

Next Prime: 28429

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 × 61 × 233

Divisors: 1, 2, 61, 122, 233, 466, 14213, 28426

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110111100001010

Octal: 67412

Duodecimal: 1454A

Hexadecimal: 6f0a

Square: 808037476

Square Root: 168.6001186239203

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) = (2·n-1)*(n² -n +2)/2. A63488

T(n,k)=Number of nXk 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 0 1 and 1 0 0 vertically. A207442

T(n,k)=Number of (n+2)X(k+2) binary arrays avoiding patterns 001 and 010 in rows and columns. A202616

a(n) = 25·n² - 14·n + 2. A154357

Irregular triangle read by rows: T(n,k) is the number of non-isomorphic directed graphs reachable in k steps (and no fewer) by n agents using the LNS protocol (see A307085); n >= 1, 0 <= k <= A383387(n). A383385

Total number of noncomposite parts in all partitions of n. A326957

Divide the positive integers into subsets of lengths given by successive primes. a(n) is the sum of primes contained in the n-th subset. A344718

Number of (n+2) X 3 binary arrays avoiding patterns 001 and 010 in rows and columns. A202609

Number of (n+2)X8 binary arrays avoiding patterns 001 and 010 in rows and columns. A202614

Number of 3Xn 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 0 1 and 1 0 0 vertically. A207443