728863123 has 16 divisors (see below), whose sum is σ = 808404480. Its totient is φ = 654027264.

The previous prime is 728863081. The next prime is 728863127. The reversal of 728863123 is 321368827.

728863123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-728863123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728863127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36915 + ... + 53107.

It is an arithmetic number, because the mean of its divisors is an integer number (50525280).

Almost surely, 2^728863123 is an apocalyptic number.

728863123 is a deficient number, since it is larger than the sum of its proper divisors (79541357).

728863123 is a wasteful number, since it uses less digits than its factorization.

728863123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16338.

The product of its digits is 96768, while the sum is 40.

The square root of 728863123 is about 26997.4651217480. The cubic root of 728863123 is about 899.9436684907.

The spelling of 728863123 in words is "seven hundred twenty-eight million, eight hundred sixty-three thousand, one hundred twenty-three".