688930 has 16 divisors (see below), whose sum is σ = 1353024. Its totient is φ = 250480.

The previous prime is 688907. The next prime is 688939. The reversal of 688930 is 39886.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688939) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3022 + ... + 3241.

It is an arithmetic number, because the mean of its divisors is an integer number (84564).

2⁶⁸⁸⁹³⁰ is an apocalyptic number.

688930 is a deficient number, since it is larger than the sum of its proper divisors (664094).

688930 is a wasteful number, since it uses less digits than its factorization.

688930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6281.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 688930 is about 830.0180720924. The cubic root of 688930 is about 88.3198587096.

It can be divided in two parts, 68 and 8930, that added together give a palindrome (8998).

The spelling of 688930 in words is "six hundred eighty-eight thousand, nine hundred thirty".