308688 has 40 divisors (see below), whose sum is σ = 818400. Its totient is φ = 100224.

The previous prime is 308681. The next prime is 308701. The reversal of 308688 is 886803.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 308688.

It is not an unprimeable number, because it can be changed into a prime (308681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2778 + ... + 2886.

It is an arithmetic number, because the mean of its divisors is an integer number (20460).

2³⁰⁸⁶⁸⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 308688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (409200).

308688 is an abundant number, since it is smaller than the sum of its proper divisors (509712).

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

308688 is a wasteful number, since it uses less digits than its factorization.

308688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 308688 is about 555.5969762337. The cubic root of 308688 is about 67.5833811837.

It can be divided in two parts, 30868 and 8, that added together give a triangular number (30876 = T₂₄₈).

The spelling of 308688 in words is "three hundred eight thousand, six hundred eighty-eight".