Properties of the Number -15385

Fifteen Thousand Three Hundred Eighty-Five

Basics

Value: -15386 → -15385 → -15384

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 5 × 17 × 181

Divisors: 1, 5, 17, 85, 181, 905, 3077, 15385

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

7925 Try Today's Challenge

Representations

Binary: -11110000011001

Octal: -36031

Duodecimal: -8AA1

Hexadecimal: -3c19

Square: 236698225

Square Root: 124.03628501370073

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) = (n + 1)*(20·n² + 19·n + 6)/6. A220084

a(n) = ∑_k=1..n floor(n/k)⁴. A318743

a(n) = A379597(n) - A381710(n). A381711

Number of (w,x,y) with all terms in {0,...,n} and w<=x+y and x<=y. A212983

Principal diagonal of the convolution array A213579. A213580

Numbers n such that φ(n + 1) | σ(n) for n congruent to 1 (mod 3). A15817

Product of prime p with sum of next p consecutive primes. A36660

Shadow of Euler's constant exp(1). A108912

Number of ways to place zero or more nonadjacent 1,1 2,0 2,1 3,2 4,1 4,2 5,3 polyhexes in any orientation on a planar nXnXn triangular grid. A155342

Heinz numbers of integer partitions into relatively prime parts whose reciprocal sum is the reciprocal of an integer. A316901