528139880 has 64 divisors (see below), whose sum is σ = 1240866000. Its totient is φ = 202051584.

The previous prime is 528139853. The next prime is 528139921. The reversal of 528139880 is 88931825.

It can be written as a sum of positive squares in 8 ways, for example, as 411197284 + 116942596 = 20278^2 + 10814^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124352 + ... + 128528.

Almost surely, 2^528139880 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 528139880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (620433000).

528139880 is an abundant number, since it is smaller than the sum of its proper divisors (712726120).

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

528139880 is a wasteful number, since it uses less digits than its factorization.

528139880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4326 (or 4322 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 44.

The square root of 528139880 is about 22981.2941324026. The cubic root of 528139880 is about 808.3193726525.

The spelling of 528139880 in words is "five hundred twenty-eight million, one hundred thirty-nine thousand, eight hundred eighty".