388656 has 30 divisors (see below), whose sum is σ = 1088100. Its totient is φ = 129504.

The previous prime is 388651. The next prime is 388657. The reversal of 388656 is 656883.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 388656.

It is not an unprimeable number, because it can be changed into a prime (388651) by changing a digit.

388656 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 5 ways as a sum of consecutive naturals, for example, 1206 + ... + 1493.

It is an arithmetic number, because the mean of its divisors is an integer number (36270).

2³⁸⁸⁶⁵⁶ is an apocalyptic number.

388656 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

388656 is an abundant number, since it is smaller than the sum of its proper divisors (699444).

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

388656 is a wasteful number, since it uses less digits than its factorization.

388656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2713 (or 2704 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 388656 is about 623.4228099773. The cubic root of 388656 is about 72.9774121646.

The spelling of 388656 in words is "three hundred eighty-eight thousand, six hundred fifty-six".