689788 has 24 divisors (see below), whose sum is σ = 1343664. Its totient is φ = 307200.

The previous prime is 689779. The next prime is 689789. The reversal of 689788 is 887986.

689788 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689789) 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, 2556 + ... + 2812.

It is an arithmetic number, because the mean of its divisors is an integer number (55986).

2⁶⁸⁹⁷⁸⁸ is an apocalyptic number.

It is an amenable number.

689788 is a deficient number, since it is larger than the sum of its proper divisors (653876).

689788 is a wasteful number, since it uses less digits than its factorization.

689788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333 (or 331 counting only the distinct ones).

The product of its digits is 193536, while the sum is 46.

The square root of 689788 is about 830.5347674842. The cubic root of 689788 is about 88.3565082977.

It can be divided in two parts, 68978 and 8, that added together give a palindrome (68986).

The spelling of 689788 in words is "six hundred eighty-nine thousand, seven hundred eighty-eight".