528724 has 24 divisors (see below), whose sum is σ = 1104768. Its totient is φ = 216480.

The previous prime is 528719. The next prime is 528763. The reversal of 528724 is 427825.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 528692 and 528701.

It is a congruent number.

It is an unprimeable number.

528724 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, 234 + ... + 1054.

It is an arithmetic number, because the mean of its divisors is an integer number (46032).

2⁵²⁸⁷²⁴ 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 528724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (552384).

528724 is an abundant number, since it is smaller than the sum of its proper divisors (576044).

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

528724 is a wasteful number, since it uses less digits than its factorization.

528724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855 (or 853 counting only the distinct ones).

The product of its digits is 4480, while the sum is 28.

The square root of 528724 is about 727.1341004244. The cubic root of 528724 is about 80.8617261886.

The spelling of 528724 in words is "five hundred twenty-eight thousand, seven hundred twenty-four".