659648 has 28 divisors (see below), whose sum is σ = 1429512. Its totient is φ = 299520.

The previous prime is 659639. The next prime is 659653. The reversal of 659648 is 846956.

Its product of digits (51840) is a multiple of the sum of its prime factors (960).

It is an unprimeable number.

659648 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236 + ... + 1172.

It is an arithmetic number, because the mean of its divisors is an integer number (51054).

2⁶⁵⁹⁶⁴⁸ 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 659648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (714756).

659648 is an abundant number, since it is smaller than the sum of its proper divisors (769864).

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

659648 is a wasteful number, since it uses less digits than its factorization.

659648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960 (or 950 counting only the distinct ones).

The product of its digits is 51840, while the sum is 38.

The square root of 659648 is about 812.1871705463. The cubic root of 659648 is about 87.0503957811.

The spelling of 659648 in words is "six hundred fifty-nine thousand, six hundred forty-eight".