728419456 has 16 divisors (see below), whose sum is σ = 1451148390. Its totient is φ = 364209664.

The previous prime is 728419427. The next prime is 728419457. The reversal of 728419456 is 654914827.

It can be written as a sum of positive squares in only one way, i.e., 645973056 + 82446400 = 25416^2 + 9080^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (728419457) by changing a digit.

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 as a sum of consecutive naturals, namely, 2845261 + ... + 2845516.

Almost surely, 2^728419456 is an apocalyptic number.

It is an amenable number.

728419456 is a deficient number, since it is larger than the sum of its proper divisors (722728934).

728419456 is an equidigital number, since it uses as much as digits as its factorization.

728419456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5690791 (or 5690779 counting only the distinct ones).

The product of its digits is 483840, while the sum is 46.

The square root of 728419456 is about 26989.2470439618. The cubic root of 728419456 is about 899.7610295577.

The spelling of 728419456 in words is "seven hundred twenty-eight million, four hundred nineteen thousand, four hundred fifty-six".