388506 has 16 divisors (see below), whose sum is σ = 788544. Its totient is φ = 127584.

The previous prime is 388499. The next prime is 388519. The reversal of 388506 is 605883.

388506 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a Curzon number.

It is an unprimeable number.

388506 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 7 ways as a sum of consecutive naturals, for example, 6 + ... + 881.

It is an arithmetic number, because the mean of its divisors is an integer number (49284).

2³⁸⁸⁵⁰⁶ is an apocalyptic number.

388506 is an abundant number, since it is smaller than the sum of its proper divisors (400038).

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

388506 is a wasteful number, since it uses less digits than its factorization.

388506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 388506 is about 623.3024947808. The cubic root of 388506 is about 72.9680225241.

The spelling of 388506 in words is "three hundred eighty-eight thousand, five hundred six".