659856 has 40 divisors (see below), whose sum is σ = 1740960. Its totient is φ = 215296.

The previous prime is 659849. The next prime is 659863. The reversal of 659856 is 658956.

It is an interprime number because it is at equal distance from previous prime (659849) and next prime (659863).

It is an unprimeable number.

659856 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2716 + ... + 2948.

It is an arithmetic number, because the mean of its divisors is an integer number (43524).

2⁶⁵⁹⁸⁵⁶ 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 659856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (870480).

659856 is an abundant number, since it is smaller than the sum of its proper divisors (1081104).

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

659856 is a wasteful number, since it uses less digits than its factorization.

659856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303 (or 297 counting only the distinct ones).

The product of its digits is 64800, while the sum is 39.

The square root of 659856 is about 812.3152097554. The cubic root of 659856 is about 87.0595443874.

Subtracting from 659856 its reverse (658956), we obtain a square (900 = 30²).

The spelling of 659856 in words is "six hundred fifty-nine thousand, eight hundred fifty-six".