728125816 has 16 divisors (see below), whose sum is σ = 1489348440. Its totient is φ = 330966240.

The previous prime is 728125813. The next prime is 728125817. The reversal of 728125816 is 618521827.

728125816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728125813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4136991 + ... + 4137166.

Almost surely, 2^728125816 is an apocalyptic number.

It is an amenable number.

728125816 is an abundant number, since it is smaller than the sum of its proper divisors (761222624).

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

728125816 is a wasteful number, since it uses less digits than its factorization.

728125816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8274174 (or 8274170 counting only the distinct ones).

The product of its digits is 53760, while the sum is 40.

The square root of 728125816 is about 26983.8065513374. The cubic root of 728125816 is about 899.6401096048.

The spelling of 728125816 in words is "seven hundred twenty-eight million, one hundred twenty-five thousand, eight hundred sixteen".