728712218072 has 32 divisors (see below), whose sum is σ = 1383272341920. Its totient is φ = 359867389440.

The previous prime is 728712218071. The next prime is 728712218111. The reversal of 728712218072 is 270812217827.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728712218071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1527329 + ... + 1946832.

It is an arithmetic number, because the mean of its divisors is an integer number (43227260685).

Almost surely, 2^728712218072 is an apocalyptic number.

It is an amenable number.

728712218072 is a deficient number, since it is larger than the sum of its proper divisors (654560123848).

728712218072 is a wasteful number, since it uses less digits than its factorization.

728712218072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3474491 (or 3474487 counting only the distinct ones).

The product of its (nonzero) digits is 351232, while the sum is 47.

The spelling of 728712218072 in words is "seven hundred twenty-eight billion, seven hundred twelve million, two hundred eighteen thousand, seventy-two".