Properties of the Number 40404

Forty Thousand Four Hundred Four

Basics

Value: 40403 → 40404 → 40405

Parity: even

Prime: No

Previous Prime: 40387

Next Prime: 40423

Digit Sum: 12

Digital Root: 3

Palindrome: Yes

Factorization: 2 ² × 3 × 7 × 13 × 37

Divisors: 1, 2, 3, 4, 6, 7, 12, 13, 14, 21

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1001110111010100

Octal: 116724

Duodecimal: 1B470

Hexadecimal: 9dd4

Square: 1632483216

Square Root: 201.00746254803576

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

Numbers whose decimal expansion contains only 0's and 4's. A169967

Alkane (or paraffin) numbers l(8,n). A5995

Triangle read by rows, T(n,k) = ∑_j=0..n C(n,j)*L(j,k), L the unsigned Lah numbers A271703, for n>=0 and 0<=k<=n. A271705

Palindromes with exactly 6 prime factors (counted with multiplicity). A46332

a(n) = (n+1)²*(n+2)*(n+3)*(3·n+4)/24. A108650

Irregular table read by rows: Take a heptagon with all diagonals drawn, as in A329713. Then T(n,k) = number of k-sided polygons in that figure for k >= 3. A329714

a(n) = ∑_k=0..2n C(2n,k)*A027907(n,k) where A027907 is the triangle of trinomial coefficients. A168595

Convolution of nonzero hexagonal numbers (A000384) with themselves. A271870

Smallest multiple of n using only digits 0 and 4. A78243

Palindromes in A085934. A85935