8820728 has 16 divisors (see below), whose sum is σ = 18901680. Its totient is φ = 3780288.

The previous prime is 8820697. The next prime is 8820733. The reversal of 8820728 is 8270288.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78701 + ... + 78812.

It is an arithmetic number, because the mean of its divisors is an integer number (1181355).

Almost surely, 2^8820728 is an apocalyptic number.

It is an amenable number.

8820728 is an abundant number, since it is smaller than the sum of its proper divisors (10080952).

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

8820728 is a wasteful number, since it uses less digits than its factorization.

8820728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157526 (or 157522 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 35.

The square root of 8820728 is about 2969.9710436299. The cubic root of 8820728 is about 206.6179952444.

The spelling of 8820728 in words is "eight million, eight hundred twenty thousand, seven hundred twenty-eight".