Properties of the Number 19388

Nineteen Thousand Three Hundred Eighty-Eight

Basics

Value: 19387 → 19388 → 19389

Parity: even

Prime: No

Previous Prime: 19387

Next Prime: 19391

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 2 ² × 37 × 131

Divisors: 1, 2, 4, 37, 74, 131, 148, 262, 524, 4847

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100101110111100

Octal: 45674

Duodecimal: B278

Hexadecimal: 4bbc

Square: 375894544

Square Root: 139.24079861879562

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) = floor(n*φ¹⁴), where φ is the golden ratio, A001622. A4929

Sum over all partitions λ of n of binomial(|λ|, |{λ}|). A339006

Numbers k such that k·2^m+1 are composites for all exponents m in the range 0<=m<=k. A61153

Number of fibodious primes (A095083) in range [2ⁿ,2ⁿ⁺¹]. A95063

Binomial transform of the periodic sequence with periodic pattern 1,1,1,0,0. A129929

Rectangular table, read by antidiagonals, where the g.f. of row n is ∑_i>=0 F_i(x)ⁿ / 2ⁱ⁺¹, where F₀(x)=x, F_n+1(x) = F_n(x+x²), for n>=1. A122941

Expansion of (1-x-x²-sqrt(1-2·x-5·x²+10·x³+x⁴))/(2·x²). A174399

Triangle read by rows: T(n,k) is the numerator of the probability of winning a 1-player game M(n,k) as defined below while playing optimally. A370398

First triangular number with digit sum = n-th triangular number. A68133

Primes with primitive root 65. A19388