728042111 has 8 divisors (see below), whose sum is σ = 731057184. Its totient is φ = 725034240.

The previous prime is 728042093. The next prime is 728042141. The reversal of 728042111 is 111240827.

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 728042111 - 2¹⁰ = 728041087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728042141) 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, 287531 + ... + 290051.

It is an arithmetic number, because the mean of its divisors is an integer number (91382148).

Almost surely, 2^728042111 is an apocalyptic number.

728042111 is a deficient number, since it is larger than the sum of its proper divisors (3015073).

728042111 is a wasteful number, since it uses less digits than its factorization.

728042111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3601.

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 728042111 is about 26982.2554839287. The cubic root of 728042111 is about 899.6056342163.

Adding to 728042111 its reverse (111240827), we get a palindrome (839282938).

The spelling of 728042111 in words is "seven hundred twenty-eight million, forty-two thousand, one hundred eleven".