220005985 has 16 divisors (see below), whose sum is σ = 270578880. Its totient is φ = 171670720.

The previous prime is 220005949. The next prime is 220006009. The reversal of 220005985 is 589500022.

It is a happy number.

It is not a de Polignac number, because 220005985 - 2²¹ = 217908833 is a prime.

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, 35799 + ... + 41491.

It is an arithmetic number, because the mean of its divisors is an integer number (16911180).

Almost surely, 2^220005985 is an apocalyptic number.

It is an amenable number.

220005985 is a deficient number, since it is larger than the sum of its proper divisors (50572895).

220005985 is a wasteful number, since it uses less digits than its factorization.

220005985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5888.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 220005985 is about 14832.5987271280. The cubic root of 220005985 is about 603.6865479199.

The spelling of 220005985 in words is "two hundred twenty million, five thousand, nine hundred eighty-five".