689604 has 12 divisors (see below), whose sum is σ = 1609104. Its totient is φ = 229864.

The previous prime is 689603. The next prime is 689621. The reversal of 689604 is 406986.

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

It is not an unprimeable number, because it can be changed into a prime (689603) 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, 28722 + ... + 28745.

It is an arithmetic number, because the mean of its divisors is an integer number (134092).

2⁶⁸⁹⁶⁰⁴ is an apocalyptic number.

It is an amenable number.

689604 is an abundant number, since it is smaller than the sum of its proper divisors (919500).

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

689604 is a wasteful number, since it uses less digits than its factorization.

689604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57474 (or 57472 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 689604 is about 830.4239880928. The cubic root of 689604 is about 88.3486512734.

The spelling of 689604 in words is "six hundred eighty-nine thousand, six hundred four".