386
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 582
- Proper Divisor Sum (Aliquot Sum)
- 196
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 192
- Möbius Function
- 1
- Radical
- 386
- Omega Function (Ω)
- 2
- Little Omega Function (ω)
- 2
Special
- Factorial
- no
- Catalan Number
- no
- Bell Number
- no
- Motzkin Number
- no
- Primorial
- no
Figurate Numbers
- Fibonacci Number
- no
- Triangular Number
- no
- Perfect Square
- no
- Perfect Cube
- no
- Pentagonal Number
- no
- Hexagonal Number
- no
- Lucas Number
- no
- Tetrahedral Number
- no
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 120
- Smith Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- Squarefree Number
- yes
- Prime Power
- no
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- yes
- Odd
- no
Names
- German
- dreihundertsechsundachtzig· ordinal: dreihundertsechsundachtzigste
- English
- three hundred eighty-six· ordinal: three hundred eighty-sixth
- Spanish
- trescientos ochenta y seis· ordinal: 386º
- French
- trois cent quatre-vingt-six· ordinal: trois cent quatre-vingt-sixième
- Italian
- trecentoottantasei· ordinal: 386º
- Latin
- trecenti octoginta sex· ordinal: 386.
- Portuguese
- trezentos e oitenta e seis· ordinal: 386º
Appears in sequences
- Maximal number of regions obtained by joining n points around a circle by straight lines. Also number of regions in 4-space formed by n-1 hyperplanes.at n=10A000127
- a(n) = 2^(2*n+1) - binomial(2*n+1, n+1).at n=4A000346
- Number of genus 0 rooted maps with 5 faces and n vertices.at n=1A000473
- First occurrence of n consecutive numbers that take same number of steps to reach 1 in 3x+1 problem.at n=5A000546
- Number of twin prime pairs < square of n-th prime.at n=35A000885
- Numbers k such that phi(k) = phi(k+2).at n=12A001494
- A Fielder sequence.at n=10A001640
- 2 together with primes multiplied by 2.at n=44A001747
- Number of partitions of n with exactly two part sizes.at n=49A002133
- Numbers k such that (k^2 + k + 1)/13 is prime.at n=19A002642
- Number of 3 X n binary matrices up to row and column permutations.at n=6A002727
- a(n) = nearest integer to n^(3/2).at n=53A002821
- Numbers k such that 2*10^k - 1 is prime.at n=11A002957
- Beginnings of periodic unitary aliquot sequences.at n=32A003062
- Numbers that are the sum of 6 positive 4th powers.at n=29A003340
- Numbers that are the sum of 11 positive 4th powers.at n=46A003345
- Numbers that are the sum of 8 positive 6th powers.at n=6A003364
- Numbers that are the sum of 5 positive 7th powers.at n=3A003372
- From a nim-like game.at n=21A003413
- Inconsummate numbers in base 10: no number is this multiple of the sum of its digits (in base 10).at n=20A003635