7985805 has 16 divisors (see below), whose sum is σ = 12862464. Its totient is φ = 4230720.

The previous prime is 7985779. The next prime is 7985839. The reversal of 7985805 is 5085897.

It is not a de Polignac number, because 7985805 - 2⁶ = 7985741 is a prime.

It is a congruent 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, 660 + ... + 4050.

It is an arithmetic number, because the mean of its divisors is an integer number (803904).

Almost surely, 2^7985805 is an apocalyptic number.

It is an amenable number.

7985805 is a deficient number, since it is larger than the sum of its proper divisors (4876659).

7985805 is a wasteful number, since it uses less digits than its factorization.

7985805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3556.

The product of its (nonzero) digits is 100800, while the sum is 42.

The square root of 7985805 is about 2825.9166654380. The cubic root of 7985805 is about 199.8816382997.

The spelling of 7985805 in words is "seven million, nine hundred eighty-five thousand, eight hundred five".