728385805 has 32 divisors (see below), whose sum is σ = 1066383360. Its totient is φ = 466482240.

The previous prime is 728385803. The next prime is 728385871. The reversal of 728385805 is 508583827.

It is not a de Polignac number, because 728385805 - 2¹ = 728385803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728385803) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39502 + ... + 54928.

It is an arithmetic number, because the mean of its divisors is an integer number (33324480).

Almost surely, 2^728385805 is an apocalyptic number.

It is an amenable number.

728385805 is a deficient number, since it is larger than the sum of its proper divisors (337997555).

728385805 is a wasteful number, since it uses less digits than its factorization.

728385805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15529.

The product of its (nonzero) digits is 537600, while the sum is 46.

The square root of 728385805 is about 26988.6236218152. The cubic root of 728385805 is about 899.7471738392.

The spelling of 728385805 in words is "seven hundred twenty-eight million, three hundred eighty-five thousand, eight hundred five".