728528820 has 24 divisors (see below), whose sum is σ = 2039880864. Its totient is φ = 194274336.

The previous prime is 728528819. The next prime is 728528839. The reversal of 728528820 is 28825827.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6071014 + ... + 6071133.

It is an arithmetic number, because the mean of its divisors is an integer number (84995036).

Almost surely, 2^728528820 is an apocalyptic number.

It is an amenable number.

728528820 is an abundant number, since it is smaller than the sum of its proper divisors (1311352044).

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

728528820 is a wasteful number, since it uses less digits than its factorization.

728528820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12142159 (or 12142157 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 42.

The square root of 728528820 is about 26991.2730340753. The cubic root of 728528820 is about 899.8060569752.

The spelling of 728528820 in words is "seven hundred twenty-eight million, five hundred twenty-eight thousand, eight hundred twenty".