528390 has 64 divisors (see below), whose sum is σ = 1497600. Its totient is φ = 132192.

The previous prime is 528383. The next prime is 528391. The reversal of 528390 is 93825.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (528391) by changing a digit.

528390 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 31 ways as a sum of consecutive naturals, for example, 5079 + ... + 5181.

It is an arithmetic number, because the mean of its divisors is an integer number (23400).

2⁵²⁸³⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 528390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (748800).

528390 is an abundant number, since it is smaller than the sum of its proper divisors (969210).

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

528390 is a wasteful number, since it uses less digits than its factorization.

528390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 528390 is about 726.9043953643. The cubic root of 528390 is about 80.8446955604.

The spelling of 528390 in words is "five hundred twenty-eight thousand, three hundred ninety".