528328509 has 16 divisors (see below), whose sum is σ = 716931072. Its totient is φ = 346027248.

The previous prime is 528328481. The next prime is 528328529. The reversal of 528328509 is 905823825.

It is not a de Polignac number, because 528328509 - 2²¹ = 526231357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (528328529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32512 + ... + 45974.

It is an arithmetic number, because the mean of its divisors is an integer number (44808192).

Almost surely, 2^528328509 is an apocalyptic number.

It is an amenable number.

528328509 is a deficient number, since it is larger than the sum of its proper divisors (188602563).

528328509 is a wasteful number, since it uses less digits than its factorization.

528328509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13696.

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 528328509 is about 22985.3977342138. The cubic root of 528328509 is about 808.4155935793.

The spelling of 528328509 in words is "five hundred twenty-eight million, three hundred twenty-eight thousand, five hundred nine".