388881 has 10 divisors (see below), whose sum is σ = 581042. Its totient is φ = 259200.

The previous prime is 388879. The next prime is 388891. The reversal of 388881 is 188883.

It can be written as a sum of positive squares in only one way, i.e., 342225 + 46656 = 585^2 + 216^2 .

It is not a de Polignac number, because 388881 - 2¹ = 388879 is a prime.

It is a super-2 number, since 2×388881² = 302456864322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2320 + ... + 2481.

2³⁸⁸⁸⁸¹ is an apocalyptic number.

It is an amenable number.

388881 is a deficient number, since it is larger than the sum of its proper divisors (192161).

388881 is an equidigital number, since it uses as much as digits as its factorization.

388881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4813 (or 4804 counting only the distinct ones).

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

The square root of 388881 is about 623.6032392475. The cubic root of 388881 is about 72.9914920966.

It can be divided in two parts, 3888 and 81, that added together give a square (3969 = 63²).

The spelling of 388881 in words is "three hundred eighty-eight thousand, eight hundred eighty-one".