528925509 has 12 divisors (see below), whose sum is σ = 873146976. Its totient is φ = 302243112.

The previous prime is 528925493. The next prime is 528925511. The reversal of 528925509 is 905529825.

528925509 is a `hidden beast` number, since 5 + 2 + 8 + 92 + 550 + 9 = 666.

It is not a de Polignac number, because 528925509 - 2⁴ = 528925493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (528925559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4197759 + ... + 4197884.

It is an arithmetic number, because the mean of its divisors is an integer number (72762248).

Almost surely, 2^528925509 is an apocalyptic number.

It is an amenable number.

528925509 is a deficient number, since it is larger than the sum of its proper divisors (344221467).

528925509 is a wasteful number, since it uses less digits than its factorization.

528925509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8395656 (or 8395653 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 45.

The square root of 528925509 is about 22998.3805734230. The cubic root of 528925509 is about 808.7199764460.

The spelling of 528925509 in words is "five hundred twenty-eight million, nine hundred twenty-five thousand, five hundred nine".