659808 has 72 divisors (see below), whose sum is σ = 1965600. Its totient is φ = 209664.

The previous prime is 659783. The next prime is 659819. The reversal of 659808 is 808956.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8313 + ... + 8391.

It is an arithmetic number, because the mean of its divisors is an integer number (27300).

2⁶⁵⁹⁸⁰⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 659808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (982800).

659808 is an abundant number, since it is smaller than the sum of its proper divisors (1305792).

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

659808 is a wasteful number, since it uses less digits than its factorization.

659808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 659808 is about 812.2856640370. The cubic root of 659808 is about 87.0574333412.

The spelling of 659808 in words is "six hundred fifty-nine thousand, eight hundred eight".