728278648 has 16 divisors (see below), whose sum is σ = 1365934680. Its totient is φ = 364029408.

The previous prime is 728278631. The next prime is 728278651. The reversal of 728278648 is 846872827.

728278648 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 728278595 and 728278604.

It is a congruent number.

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, 19011 + ... + 42637.

Almost surely, 2^728278648 is an apocalyptic number.

It is an amenable number.

728278648 is a deficient number, since it is larger than the sum of its proper divisors (637656032).

728278648 is a wasteful number, since it uses less digits than its factorization.

728278648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27486 (or 27482 counting only the distinct ones).

The product of its digits is 2408448, while the sum is 52.

The square root of 728278648 is about 26986.6383234370. The cubic root of 728278648 is about 899.7030493585.

The spelling of 728278648 in words is "seven hundred twenty-eight million, two hundred seventy-eight thousand, six hundred forty-eight".