528009640 has 16 divisors (see below), whose sum is σ = 1188021780. Its totient is φ = 211203840.

The previous prime is 528009637. The next prime is 528009659. The reversal of 528009640 is 46900825.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 503822916 + 24186724 = 22446^2 + 4918^2 .

It is a junction number, because it is equal to n+sod(n) for n = 528009596 and 528009605.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6600081 + ... + 6600160.

Almost surely, 2^528009640 is an apocalyptic number.

It is an amenable number.

528009640 is an abundant number, since it is smaller than the sum of its proper divisors (660012140).

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

528009640 is a wasteful number, since it uses less digits than its factorization.

528009640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13200252 (or 13200248 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 528009640 is about 22978.4603487701. The cubic root of 528009640 is about 808.2529229776.

The spelling of 528009640 in words is "five hundred twenty-eight million, nine thousand, six hundred forty".