Properties of the Number 186

One Hundred Eighty-Six

Basics

Value: 185 → 186 → 187

Parity: even

Prime: No

Previous Prime: 181

Next Prime: 191

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 31

Divisors: 1, 2, 3, 6, 31, 62, 93, 186

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10111010

Octal: 272

Duodecimal: 136

Hexadecimal: ba

Square: 34596

Square Root: 13.638181696985855

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

Abundant numbers (sum of divisors of m exceeds 2m). A5101

Numbers that are the product of exactly three (not necessarily distinct) primes. A14612

a(n) = ∑_k=1..n floor(n/k); also ∑_k=1..n d(k), where d = number of divisors (A000005); also number of solutions to x·y = z with 1 <= x,y,z <= n. A6218

Positive integers congruent to 2 (mod 4): a(n) = 4·n+2, for n >= 0. A16825

Number of degree-n irreducible polynomials over GF(2); number of n-bead necklaces with beads of 2 colors when turning over is not allowed and with primitive period n; number of binary Lyndon words of length n. A1037

Sphenic numbers: products of 3 distinct primes. A7304

Numbers that are the sum of 2 successive primes. A1043

Number of alternating compositions, i.e., compositions with alternating increases and decreases, starting with either an increase or a decrease. A25047

a(n) = (1/n) * ∑_{d divides n} μ(n/d) * (2^d - 1). A59966

Zumkeller or integer-perfect numbers: numbers n whose divisors can be partitioned into two disjoint sets with equal sum. A83207

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