728883009 has 16 divisors (see below), whose sum is σ = 1092840000. Its totient is φ = 480066048.

The previous prime is 728882989. The next prime is 728883031. The reversal of 728883009 is 900388827.

It is not a de Polignac number, because 728883009 - 2¹¹ = 728880961 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (728883059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160384 + ... + 164865.

It is an arithmetic number, because the mean of its divisors is an integer number (68302500).

Almost surely, 2^728883009 is an apocalyptic number.

It is an amenable number.

728883009 is a deficient number, since it is larger than the sum of its proper divisors (363956991).

728883009 is a wasteful number, since it uses less digits than its factorization.

728883009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325341 (or 325335 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 728883009 is about 26997.8334130722. The cubic root of 728883009 is about 899.9518529799.

The spelling of 728883009 in words is "seven hundred twenty-eight million, eight hundred eighty-three thousand, nine".