728504668 has 48 divisors (see below), whose sum is σ = 1369509120. Its totient is φ = 338304384.

The previous prime is 728504641. The next prime is 728504671. The reversal of 728504668 is 866405827.

728504668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

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, 449163 + ... + 450781.

It is an arithmetic number, because the mean of its divisors is an integer number (28531440).

Almost surely, 2^728504668 is an apocalyptic number.

It is an amenable number.

728504668 is a deficient number, since it is larger than the sum of its proper divisors (641004452).

728504668 is a wasteful number, since it uses less digits than its factorization.

728504668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1786 (or 1784 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 46.

The square root of 728504668 is about 26990.8256264976. The cubic root of 728504668 is about 899.7961134857.

The spelling of 728504668 in words is "seven hundred twenty-eight million, five hundred four thousand, six hundred sixty-eight".