688956 has 12 divisors (see below), whose sum is σ = 1607592. Its totient is φ = 229648.

The previous prime is 688951. The next prime is 688957. The reversal of 688956 is 659886.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28695 + ... + 28718.

It is an arithmetic number, because the mean of its divisors is an integer number (133966).

2⁶⁸⁸⁹⁵⁶ is an apocalyptic number.

It is an amenable number.

688956 is an abundant number, since it is smaller than the sum of its proper divisors (918636).

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

688956 is a wasteful number, since it uses less digits than its factorization.

688956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57420 (or 57418 counting only the distinct ones).

The product of its digits is 103680, while the sum is 42.

The square root of 688956 is about 830.0337342542. The cubic root of 688956 is about 88.3209697502.

The spelling of 688956 in words is "six hundred eighty-eight thousand, nine hundred fifty-six".