528728640 has 112 divisors (see below), whose sum is σ = 1831360320. Its totient is φ = 128174080.

The previous prime is 528728633. The next prime is 528728657. The reversal of 528728640 is 46827825.

It is a happy number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 528728592 and 528728601.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14475 + ... + 35594.

Almost surely, 2^528728640 is an apocalyptic number.

It is an amenable number.

528728640 is an abundant number, since it is smaller than the sum of its proper divisors (1302631680).

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

528728640 is a wasteful number, since it uses less digits than its factorization.

528728640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50100 (or 50090 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 42.

The square root of 528728640 is about 22994.1001128550. The cubic root of 528728640 is about 808.6196273121.

The spelling of 528728640 in words is "five hundred twenty-eight million, seven hundred twenty-eight thousand, six hundred forty".