Properties of the Number 19908

Nineteen Thousand Nine Hundred Eight

Basics

Value: 19907 → 19908 → 19909

Parity: even

Prime: No

Previous Prime: 19891

Next Prime: 19913

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 2 ² × 3 ² × 7 × 79

Divisors: 1, 2, 3, 4, 6, 7, 9, 12, 14, 18

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100110111000100

Octal: 46704

Duodecimal: B630

Hexadecimal: 4dc4

Square: 396328464

Square Root: 141.09571219565817

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) = ∑_k=1..n k² * floor(n/k)². A350123

Column 2 of triangle A127058. A127059

Pseudo-Kaprekar triples: q such that if q=x+y+z, then q³=x·10ⁱ + y·10^j + z, where (y·10^j+z < 10ⁱ) and z < 10^j. A60768

Numbers of the form N = a+b+c such that N³ = concat(a,b,c); a, b, c > 0. A328198

Triangle, read by rows, defined by: T(n,k) = ∑_j=0..n-k-1 T(j+k,k)*T(n-j,k+1) for n > k >= 0, with T(n,n) = n+1. A127058

a(n) = 686·n + 14. A157366

Number of partitions p of 2n+1 such that n - (number of parts of p) is a part of p. A238742

Number of conjugacy classes in the group GL(3,Z_n). A86768

Triangle read by rows: T(n,k) is number of noncrossing trees with n edges and having k nonroot branch nodes. A101431

Expansion of (b(q) / b(q²))² in powers of q where b() is a cubic AGM θ function. A242405