Properties of the Number -18290

Eighteen Thousand Two Hundred Ninety

Basics

Value: -18291 → -18290 → -18289

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 × 5 × 31 × 59

Divisors: 1, 2, 5, 10, 31, 59, 62, 118, 155, 295

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

9108 Try Today's Challenge

Representations

Binary: -100011101110010

Octal: -43562

Duodecimal: -A702

Hexadecimal: -4772

Square: 334524100

Square Root: 135.24052647043342

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 k such that k and k+1 have 4 distinct prime factors. A140078

Numbers k such that k and k+1 each have at least 4 distinct prime factors. A321504

Numbers k such that k and k+1 are the product of exactly four distinct primes. A318896

Number of (w,x,y,z) with all terms in {1,...,n} and 3·w = x+y+z. A212069

a(n) = floor(n³/3). A131476

Nonnegative numbers k such that 3·k + 2 is a cube. A287335

Number of ways to write highly composite numbers (A002182(n)) as the difference of two primes, both <= 2·A002182(n). A228945

Number of base 30 n-digit numbers with adjacent digits differing by four or less. A126525

a(1) = 1; a(n) = -∑_k=1..n a(k/gcd(n,k)). A343762

a(n) is the index of the smallest n-gonal pyramidal number with exactly n distinct prime factors. A359015