528881220 has 144 divisors (see below), whose sum is σ = 1941383808. Its totient is φ = 113771520.

The previous prime is 528881137. The next prime is 528881233. The reversal of 528881220 is 22188825.

It is a happy number.

528881220 is a `hidden beast` number, since 528 + 8 + 8 + 122 + 0 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9075 + ... + 33765.

It is an arithmetic number, because the mean of its divisors is an integer number (13481832).

Almost surely, 2^528881220 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 528881220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (970691904).

528881220 is an abundant number, since it is smaller than the sum of its proper divisors (1412502588).

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

528881220 is a wasteful number, since it uses less digits than its factorization.

528881220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24730 (or 24725 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The square root of 528881220 is about 22997.4176811224. The cubic root of 528881220 is about 808.6974033879.

The spelling of 528881220 in words is "five hundred twenty-eight million, eight hundred eighty-one thousand, two hundred twenty".