728020913 has 8 divisors (see below), whose sum is σ = 730741536. Its totient is φ = 725306400.

The previous prime is 728020889. The next prime is 728020933. The reversal of 728020913 is 319020827.

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 728020913 - 2¹⁰ = 728019889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 728020913.

It is not an unprimeable number, because it can be changed into a prime (728020933) 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 7 ways as a sum of consecutive naturals, for example, 421670 + ... + 423392.

It is an arithmetic number, because the mean of its divisors is an integer number (91342692).

Almost surely, 2^728020913 is an apocalyptic number.

It is an amenable number.

728020913 is a deficient number, since it is larger than the sum of its proper divisors (2720623).

728020913 is a wasteful number, since it uses less digits than its factorization.

728020913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3055.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 728020913 is about 26981.8626673549. The cubic root of 728020913 is about 899.5969030247.

The spelling of 728020913 in words is "seven hundred twenty-eight million, twenty thousand, nine hundred thirteen".