Properties of the Number 16628

Sixteen Thousand Six Hundred Twenty-Eight

Basics

Value: 16627 → 16628 → 16629

Parity: even

Prime: No

Previous Prime: 16619

Next Prime: 16631

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 4157

Divisors: 1, 2, 4, 4157, 8314, 16628

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100000011110100

Octal: 40364

Duodecimal: 9758

Hexadecimal: 40f4

Square: 276490384

Square Root: 128.94960255851896

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) = a(n-1) + a(m) for n >= 4, where m = 2·n - 2 - 2^p+1 and p is the unique integer such that 2^p < n - 1 <= 2^p+1, starting with a(1) = a(2) = a(3) = 1. A50027

Number of n X 1 0..3 arrays with no element equal to zero plus the sum of elements to its left or zero plus the sum of elements above it or one plus the sum of the elements diagonally to its northwest or one plus the sum of the elements antidiagonally to its northeast, modulo 4. A239851

Dirichlet inverse of Catalan numbers, when started from A000108(1): 1, 2, 5, 14, 42, ... A349449

Number of nonprimes <= prime(n)². A53683

Numbers n such that 4·10ⁿ + 8·R_n - 1 is prime, where R_n = 11...1 is the repunit (A002275) of length n. A102999

Numbers n such that 5·10ⁿ + 6·R_n + 3 is prime, where R_n = 11...1 is the repunit (A002275) of length n. A103018

a(n) = floor(Fibonacci(n)/prime(n)). A130732

a(n) is the number of boards in English Peg Solitaire after n moves from which the winning position can be reached. A351286

Number of partitions of n with equal nonzero number of parts congruent to each of 2 and 3 (mod 5). A35569

Numbers k such that (109·10^k + 17)/9 is prime. A294910