388386 has 12 divisors (see below), whose sum is σ = 841542. Its totient is φ = 129456.

The previous prime is 388373. The next prime is 388391. The reversal of 388386 is 683883.

It can be written as a sum of positive squares in only one way, i.e., 269361 + 119025 = 519^2 + 345^2 .

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 388386.

It is an unprimeable number.

388386 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, 10771 + ... + 10806.

2³⁸⁸³⁸⁶ is an apocalyptic number.

388386 is an abundant number, since it is smaller than the sum of its proper divisors (453156).

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

388386 is a wasteful number, since it uses less digits than its factorization.

388386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21585 (or 21582 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 388386 is about 623.2062258996. The cubic root of 388386 is about 72.9605090714.

It can be divided in two parts, 3883 and 86, that added together give a square (3969 = 63²).

The spelling of 388386 in words is "three hundred eighty-eight thousand, three hundred eighty-six".