728469905 has 8 divisors (see below), whose sum is σ = 874369512. Its totient is φ = 582638848.

The previous prime is 728469893. The next prime is 728469913. The reversal of 728469905 is 509964827.

It is a happy number.

728469905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 167159041 + 561310864 = 12929^2 + 23692^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 728469905 - 2⁸ = 728469649 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10217 + ... + 39513.

It is an arithmetic number, because the mean of its divisors is an integer number (109296189).

Almost surely, 2^728469905 is an apocalyptic number.

It is an amenable number.

728469905 is a deficient number, since it is larger than the sum of its proper divisors (145899607).

728469905 is a wasteful number, since it uses less digits than its factorization.

728469905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34275.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The square root of 728469905 is about 26990.1816407374. The cubic root of 728469905 is about 899.7818010129.

The spelling of 728469905 in words is "seven hundred twenty-eight million, four hundred sixty-nine thousand, nine hundred five".