728828 has 24 divisors (see below), whose sum is σ = 1354080. Its totient is φ = 342720.

The previous prime is 728813. The next prime is 728831. The reversal of 728828 is 828827.

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 7 ways as a sum of consecutive naturals, for example, 7025 + ... + 7127.

It is an arithmetic number, because the mean of its divisors is an integer number (56420).

2⁷²⁸⁸²⁸ is an apocalyptic number.

It is an amenable number.

728828 is a deficient number, since it is larger than the sum of its proper divisors (625252).

728828 is a wasteful number, since it uses less digits than its factorization.

728828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 195 counting only the distinct ones).

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

The square root of 728828 is about 853.7142379040. The cubic root of 728828 is about 89.9929212540.

Subtracting 728828 from its reverse (828827), we obtain a palindrome (99999).

The spelling of 728828 in words is "seven hundred twenty-eight thousand, eight hundred twenty-eight".