868788 has 18 divisors (see below), whose sum is σ = 2196194. Its totient is φ = 289584.

The previous prime is 868787. The next prime is 868793. The reversal of 868788 is 887868.

It can be written as a sum of positive squares in only one way, i.e., 725904 + 142884 = 852^2 + 378^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868783) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12031 + ... + 12102.

2⁸⁶⁸⁷⁸⁸ is an apocalyptic number.

It is an amenable number.

868788 is an abundant number, since it is smaller than the sum of its proper divisors (1327406).

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

868788 is a wasteful number, since it uses less digits than its factorization.

868788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24143 (or 24138 counting only the distinct ones).

The product of its digits is 172032, while the sum is 45.

The square root of 868788 is about 932.0879786801. The cubic root of 868788 is about 95.4196760703.

The spelling of 868788 in words is "eight hundred sixty-eight thousand, seven hundred eighty-eight".