388818 has 12 divisors (see below), whose sum is σ = 842478. Its totient is φ = 129600.

The previous prime is 388813. The next prime is 388823. The reversal of 388818 is 818883.

It is an interprime number because it is at equal distance from previous prime (388813) and next prime (388823).

It can be written as a sum of positive squares in only one way, i.e., 257049 + 131769 = 507^2 + 363^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 388818.

It is not an unprimeable number, because it can be changed into a prime (388813) by changing a digit.

388818 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, 10783 + ... + 10818.

2³⁸⁸⁸¹⁸ is an apocalyptic number.

388818 is an abundant number, since it is smaller than the sum of its proper divisors (453660).

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

388818 is a wasteful number, since it uses less digits than its factorization.

388818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21609 (or 21606 counting only the distinct ones).

The product of its digits is 12288, while the sum is 36.

The square root of 388818 is about 623.5527243145. The cubic root of 388818 is about 72.9875502632.

The spelling of 388818 in words is "three hundred eighty-eight thousand, eight hundred eighteen".