388556 has 12 divisors (see below), whose sum is σ = 777168. Its totient is φ = 166512.

The previous prime is 388541. The next prime is 388567. The reversal of 388556 is 655883.

388556 is an admirable number.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

388556 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6911 + ... + 6966.

It is an arithmetic number, because the mean of its divisors is an integer number (64764).

2³⁸⁸⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

388556 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

388556 is a wasteful number, since it uses less digits than its factorization.

388556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13888 (or 13886 counting only the distinct ones).

The product of its digits is 28800, while the sum is 35.

The square root of 388556 is about 623.3426024266. The cubic root of 388556 is about 72.9711526727.

Subtracting from 388556 its sum of digits (35), we obtain a triangular number (388521 = T₈₈₁).

The spelling of 388556 in words is "three hundred eighty-eight thousand, five hundred fifty-six".