728730912 has 96 divisors (see below), whose sum is σ = 2354389632. Its totient is φ = 192190464.

The previous prime is 728730887. The next prime is 728730913. The reversal of 728730912 is 219037827.

728730912 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (728730913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32973 + ... + 50444.

It is an arithmetic number, because the mean of its divisors is an integer number (24524892).

Almost surely, 2^728730912 is an apocalyptic number.

It is an amenable number.

728730912 is an abundant number, since it is smaller than the sum of its proper divisors (1625658720).

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

728730912 is a wasteful number, since it uses less digits than its factorization.

728730912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83450 (or 83442 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 728730912 is about 26995.0164289633. The cubic root of 728730912 is about 899.8892505698.

The spelling of 728730912 in words is "seven hundred twenty-eight million, seven hundred thirty thousand, nine hundred twelve".