688026 has 8 divisors (see below), whose sum is σ = 1376064. Its totient is φ = 229340.

The previous prime is 688013. The next prime is 688027. The reversal of 688026 is 620886.

It is a sphenic number, since it is the product of 3 distinct primes.

688026 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 687984 and 688002.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 688026.

It is not an unprimeable number, because it can be changed into a prime (688027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57330 + ... + 57341.

It is an arithmetic number, because the mean of its divisors is an integer number (172008).

2⁶⁸⁸⁰²⁶ is an apocalyptic number.

688026 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

688026 is a wasteful number, since it uses less digits than its factorization.

688026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114676.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 688026 is about 829.4733268768. The cubic root of 688026 is about 88.2812112903.

The spelling of 688026 in words is "six hundred eighty-eight thousand, twenty-six".