8085405 has 16 divisors (see below), whose sum is σ = 13253184. Its totient is φ = 4206720.

The previous prime is 8085379. The next prime is 8085433. The reversal of 8085405 is 5045808.

It is not a de Polignac number, because 8085405 - 2¹¹ = 8083357 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5959 + ... + 7188.

It is an arithmetic number, because the mean of its divisors is an integer number (828324).

Almost surely, 2^8085405 is an apocalyptic number.

It is an amenable number.

8085405 is a deficient number, since it is larger than the sum of its proper divisors (5167779).

8085405 is a wasteful number, since it uses less digits than its factorization.

8085405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13196.

The product of its (nonzero) digits is 6400, while the sum is 30.

The square root of 8085405 is about 2843.4846579505. The cubic root of 8085405 is about 200.7091906044.

The spelling of 8085405 in words is "eight million, eighty-five thousand, four hundred five".