728543616 has 128 divisors (see below), whose sum is σ = 2031644160. Its totient is φ = 231045120.

The previous prime is 728543573. The next prime is 728543681. The reversal of 728543616 is 616345827.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 667231 + ... + 668321.

It is an arithmetic number, because the mean of its divisors is an integer number (15872220).

Almost surely, 2^728543616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 728543616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1015822080).

728543616 is an abundant number, since it is smaller than the sum of its proper divisors (1303100544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

728543616 is a wasteful number, since it uses less digits than its factorization.

728543616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192 (or 1180 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 728543616 is about 26991.5471212748. The cubic root of 728543616 is about 899.8121484479.

The spelling of 728543616 in words is "seven hundred twenty-eight million, five hundred forty-three thousand, six hundred sixteen".