Properties of the Number 15380

Fifteen Thousand Three Hundred Eighty

Basics

Value: 15379 → 15380 → 15381

Parity: even

Prime: No

Previous Prime: 15377

Next Prime: 15383

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 ² × 5 × 769

Divisors: 1, 2, 4, 5, 10, 20, 769, 1538, 3076, 3845

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11110000010100

Octal: 36024

Duodecimal: 8A98

Hexadecimal: 3c14

Square: 236544400

Square Root: 124.01612798341996

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

Expansion of g.f. A(x) satisfies A( x·A(x)³ + x·A(x)⁴ ) = A(x)⁴. A371716

Moebius transform of tetrahedral numbers. A117108

Triangular array: For n >= 2 and 0 <= k <= n - 2, T(n, k) equals the number of rooted duplication trees on n gene segments whose leftmost visible duplication event is (k, r), for 1 <= r <= (n - k)/2. A264869

Expansion of (1/x) * Series_Reversion( x / ((1+x) * (1+x⁴)) ). A369444

a(n) = 16·n² + 4. A158444

Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 62. A31740

Interprimes which are of the form s·prime, s=20. A75295

Row sums of triangle defined in A113821. A160969

Expansion of 1/((1-5x)(1-8x)(1-11x)(1-12x)). A28195

Gaussian binomial coefficient [ n,9 ] for q=-8. A15380