Properties of the Number -17986

Seventeen Thousand Nine Hundred Eighty-Six

Basics

Value: -17987 → -17986 → -17985

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 2 × 17 × 23 ²

Divisors: 1, 2, 17, 23, 34, 46, 391, 529, 782, 1058

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

7925 Try Today's Challenge

Representations

Binary: -100011001000010

Octal: -43102

Duodecimal: -A4AA

Hexadecimal: -4642

Square: 323496196

Square Root: 134.1118935814419

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

The n-th n-gonal number: a(n) = n*(n² - 3·n + 4)/2. A60354

T(n,k) = number of arrays of the median of three adjacent elements of some length n+2 0..k array. A228740

Total number of parts coprime to n in the partitions of n into 10 parts. A363328

House numbers (version 2): a(n) = (n+1)³ + (n+1)*∑_i=0..n i. A50509

Positions of zeros in A165597. A165598

Number of ordered 5-multiantichains on an n-set. A92883

Number of base 32 n-digit numbers with adjacent digits differing by two or less. A126419

Expansion of (1-x)²*(1-3·x)/((1-3·x+x²)*(1-5·x+5·x²)). A217778

Expansion of -2·x²*(-3-2·x+x²-x³-2·x⁴+x⁵) / ( (1+x)²*(x-1)⁴ ). A178465

Number of partitions of n plus number of divisors of n. A195364