3985985 has 8 divisors (see below), whose sum is σ = 4801896. Its totient is φ = 3176320.

The previous prime is 3985951. The next prime is 3985999. The reversal of 3985985 is 5895893.

It can be written as a sum of positive squares in 4 ways, for example, as 49729 + 3936256 = 223^2 + 1984^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3985985 - 2¹² = 3981889 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14 + ... + 2823.

It is an arithmetic number, because the mean of its divisors is an integer number (600237).

Almost surely, 2^3985985 is an apocalyptic number.

It is an amenable number.

3985985 is a deficient number, since it is larger than the sum of its proper divisors (815911).

3985985 is a wasteful number, since it uses less digits than its factorization.

3985985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3123.

The product of its digits is 388800, while the sum is 47.

The square root of 3985985 is about 1996.4931755456. The cubic root of 3985985 is about 158.5544930337.

The spelling of 3985985 in words is "three million, nine hundred eighty-five thousand, nine hundred eighty-five".