4085905705 has 16 divisors (see below), whose sum is σ = 5605259904. Its totient is φ = 2800897920.

The previous prime is 4085905697. The next prime is 4085905757. The reversal of 4085905705 is 5075095804.

It is not a de Polignac number, because 4085905705 - 2³ = 4085905697 is a prime.

It is a Duffinian number.

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, 109510 + ... + 142000.

It is an arithmetic number, because the mean of its divisors is an integer number (350328744).

Almost surely, 2^4085905705 is an apocalyptic number.

It is an amenable number.

4085905705 is a deficient number, since it is larger than the sum of its proper divisors (1519354199).

4085905705 is a wasteful number, since it uses less digits than its factorization.

4085905705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36096.

The product of its (nonzero) digits is 252000, while the sum is 43.

The square root of 4085905705 is about 63921.0896731274. The cubic root of 4085905705 is about 1598.6845574751.

The spelling of 4085905705 in words is "four billion, eighty-five million, nine hundred five thousand, seven hundred five".