386556 has 12 divisors (see below), whose sum is σ = 901992. Its totient is φ = 128848.

The previous prime is 386549. The next prime is 386569. The reversal of 386556 is 655683.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×386556² = 298851082272, which contains 22 as substring.

It is a nialpdrome in base 5.

It is a zygodrome in base 5.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 386556.

It is an unprimeable number.

386556 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16095 + ... + 16118.

It is an arithmetic number, because the mean of its divisors is an integer number (75166).

2³⁸⁶⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

386556 is an abundant number, since it is smaller than the sum of its proper divisors (515436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

386556 is a wasteful number, since it uses less digits than its factorization.

386556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32220 (or 32218 counting only the distinct ones).

The product of its digits is 21600, while the sum is 33.

The square root of 386556 is about 621.7362784976. The cubic root of 386556 is about 72.8457366666.

Adding to 386556 its product of digits (21600), we get a triangular number (408156 = T₉₀₃).

The spelling of 386556 in words is "three hundred eighty-six thousand, five hundred fifty-six".