659438960 has 80 divisors (see below), whose sum is σ = 1559900160. Its totient is φ = 259226880.

The previous prime is 659438953. The next prime is 659438963. The reversal of 659438960 is 69834956.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 659438899 and 659438908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659438963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1573631 + ... + 1574049.

It is an arithmetic number, because the mean of its divisors is an integer number (19498752).

Almost surely, 2^659438960 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 659438960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (779950080).

659438960 is an abundant number, since it is smaller than the sum of its proper divisors (900461200).

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

659438960 is a wasteful number, since it uses less digits than its factorization.

659438960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726 (or 720 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 50.

The square root of 659438960 is about 25679.5436096516. The cubic root of 659438960 is about 870.4119949395.

It can be divided in two parts, 6594 and 38960, that added together give a palindrome (45554).

The spelling of 659438960 in words is "six hundred fifty-nine million, four hundred thirty-eight thousand, nine hundred sixty".