659628 has 36 divisors (see below), whose sum is σ = 1696968. Its totient is φ = 216000.

The previous prime is 659621. The next prime is 659629. The reversal of 659628 is 826956.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is an Ulam number.

It is a d-powerful number, because it can be written as 6 + 5⁸ + 6² + 9⁴ + 2⁸ + 8⁶ .

It is a junction number, because it is equal to n+sod(n) for n = 659592 and 659601.

It is not an unprimeable number, because it can be changed into a prime (659621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2503 + ... + 2753.

It is an arithmetic number, because the mean of its divisors is an integer number (47138).

2⁶⁵⁹⁶²⁸ 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 659628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (848484).

659628 is an abundant number, since it is smaller than the sum of its proper divisors (1037340).

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

659628 is a wasteful number, since it uses less digits than its factorization.

659628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 329 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 659628 is about 812.1748580201. The cubic root of 659628 is about 87.0495160061.

The spelling of 659628 in words is "six hundred fifty-nine thousand, six hundred twenty-eight".