388878 has 32 divisors (see below), whose sum is σ = 912384. Its totient is φ = 108192.

The previous prime is 388859. The next prime is 388879. The reversal of 388878 is 878883.

It is a Harshad number since it is a multiple of its sum of digits (42).

Its product of digits (86016) is a multiple of the sum of its prime divisors (256).

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 388878.

It is not an unprimeable number, because it can be changed into a prime (388879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1876 + ... + 2072.

It is an arithmetic number, because the mean of its divisors is an integer number (28512).

2³⁸⁸⁸⁷⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 388878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (456192).

388878 is an abundant number, since it is smaller than the sum of its proper divisors (523506).

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

388878 is a wasteful number, since it uses less digits than its factorization.

388878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256.

The product of its digits is 86016, while the sum is 42.

The square root of 388878 is about 623.6008338673. The cubic root of 388878 is about 72.9913043999.

The spelling of 388878 in words is "three hundred eighty-eight thousand, eight hundred seventy-eight".