288388 has 12 divisors (see below), whose sum is σ = 534492. Its totient is φ = 135680.

The previous prime is 288383. The next prime is 288389. The reversal of 288388 is 883882.

It can be written as a sum of positive squares in 2 ways, for example, as 262144 + 26244 = 512^2 + 162^2 .

It is not an unprimeable number, because it can be changed into a prime (288383) by changing a digit.

288388 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2053 + ... + 2188.

It is an arithmetic number, because the mean of its divisors is an integer number (44541).

2²⁸⁸³⁸⁸ is an apocalyptic number.

It is an amenable number.

288388 is a deficient number, since it is larger than the sum of its proper divisors (246104).

288388 is a wasteful number, since it uses less digits than its factorization.

288388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4262 (or 4260 counting only the distinct ones).

The product of its digits is 24576, while the sum is 37.

The square root of 288388 is about 537.0176905838. The cubic root of 288388 is about 66.0681878685.

It can be divided in two parts, 288 and 388, that added together give a palindrome (676).

The spelling of 288388 in words is "two hundred eighty-eight thousand, three hundred eighty-eight".