728908736818 has 8 divisors (see below), whose sum is σ = 1093419513648. Its totient is φ = 364435565604.

The previous prime is 728908736779. The next prime is 728908736821. The reversal of 728908736818 is 818637809827.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×728908736818² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9352896 + ... + 9430507.

It is an arithmetic number, because the mean of its divisors is an integer number (136677439206).

Almost surely, 2^728908736818 is an apocalyptic number.

728908736818 is a deficient number, since it is larger than the sum of its proper divisors (364510776830).

728908736818 is a wasteful number, since it uses less digits than its factorization.

728908736818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18802808.

The product of its (nonzero) digits is 65028096, while the sum is 67.

The spelling of 728908736818 in words is "seven hundred twenty-eight billion, nine hundred eight million, seven hundred thirty-six thousand, eight hundred eighteen".