Properties of the Number 19400

Nineteen Thousand Four Hundred

Basics

Value: 19399 → 19400 → 19401

Parity: even

Prime: No

Previous Prime: 19391

Next Prime: 19403

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 2 ³ × 5 ² × 97

Divisors: 1, 2, 4, 5, 8, 10, 20, 25, 40, 50

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100101111001000

Octal: 45710

Duodecimal: B288

Hexadecimal: 4bc8

Square: 376360000

Square Root: 139.2838827718412

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) = n²*(5·n-3)/2. A6597

a(1) = 1, otherwise a(n) = floor(eⁿ⁺¹/(e² + 1)). A90039

Relative of Hofstadter Q-sequence: a(n) = max(0, n+19395) for n <= 0; a(n) = a(n-a(n-1)) + a(n-a(n-2)) + a(n-a(n-3)) for n > 0. A283886

Number of non-isomorphic cyclic Haar graphs on 2·n nodes. A357000

Expansion of 1/( 1 - ∑_k>=0 x^{3^k} / (1 - x^{3^k}) ). A382367

Sums of 4 distinct powers of 5. A38476

Sum of first n 8-almost primes. A86061

Number of binary strings of length n with equal numbers of 00011 and 01100 substrings. A164231

Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of the Delannoy matrix (A008288). A204135

a(1) = 3; a(n+1) = a(n)-th nonprime, where nonprimes begin at 0. A25000