728105 has 16 divisors (see below), whose sum is σ = 1016064. Its totient is φ = 490560.

The previous prime is 728087. The next prime is 728113. The reversal of 728105 is 501827.

It is a de Polignac number, because none of the positive numbers 2^k-728105 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 728105.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2339 + ... + 2631.

It is an arithmetic number, because the mean of its divisors is an integer number (63504).

2⁷²⁸¹⁰⁵ is an apocalyptic number.

It is an amenable number.

728105 is a deficient number, since it is larger than the sum of its proper divisors (287959).

728105 is a wasteful number, since it uses less digits than its factorization.

728105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 728105 is about 853.2906890386. The cubic root of 728105 is about 89.9631536413.

The spelling of 728105 in words is "seven hundred twenty-eight thousand, one hundred five".