3839985 has 12 divisors (see below), whose sum is σ = 6656052. Its totient is φ = 2047968.

The previous prime is 3839963. The next prime is 3839987. The reversal of 3839985 is 5899383.

It can be written as a sum of positive squares in 2 ways, for example, as 1292769 + 2547216 = 1137^2 + 1596^2 .

It is not a de Polignac number, because 3839985 - 2¹⁵ = 3807217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 85333 = 3839985 / (3 + 8 + 3 + 9 + 9 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 3839985.

It is not an unprimeable number, because it can be changed into a prime (3839987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42622 + ... + 42711.

It is an arithmetic number, because the mean of its divisors is an integer number (554671).

Almost surely, 2^3839985 is an apocalyptic number.

It is an amenable number.

3839985 is a deficient number, since it is larger than the sum of its proper divisors (2816067).

3839985 is a wasteful number, since it uses less digits than its factorization.

3839985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85344 (or 85341 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 3839985 is about 1959.5879668951. The cubic root of 3839985 is about 156.5945017471.

The spelling of 3839985 in words is "three million, eight hundred thirty-nine thousand, nine hundred eighty-five".