728956285 has 4 divisors (see below), whose sum is σ = 874747548. Its totient is φ = 583165024.

The previous prime is 728956279. The next prime is 728956297. The reversal of 728956285 is 582659827.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 331312804 + 397643481 = 18202^2 + 19941^2 .

It is a cyclic number.

It is not a de Polignac number, because 728956285 - 2⁷ = 728956157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72895624 + ... + 72895633.

It is an arithmetic number, because the mean of its divisors is an integer number (218686887).

Almost surely, 2^728956285 is an apocalyptic number.

It is an amenable number.

728956285 is a deficient number, since it is larger than the sum of its proper divisors (145791263).

728956285 is a wasteful number, since it uses less digits than its factorization.

728956285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145791262.

The product of its digits is 2419200, while the sum is 52.

The square root of 728956285 is about 26999.1904508265. The cubic root of 728956285 is about 899.9820099285.

The spelling of 728956285 in words is "seven hundred twenty-eight million, nine hundred fifty-six thousand, two hundred eighty-five".