3881985 has 32 divisors (see below), whose sum is σ = 6687360. Its totient is φ = 1916928.

The previous prime is 3881959. The next prime is 3881987. The reversal of 3881985 is 5891883.

It is not a de Polignac number, because 3881985 - 2⁵ = 3881953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3881987) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14977 + ... + 15233.

It is an arithmetic number, because the mean of its divisors is an integer number (208980).

Almost surely, 2^3881985 is an apocalyptic number.

It is an amenable number.

3881985 is a deficient number, since it is larger than the sum of its proper divisors (2805375).

3881985 is a wasteful number, since it uses less digits than its factorization.

3881985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337.

The product of its digits is 69120, while the sum is 42.

The square root of 3881985 is about 1970.2753614660. The cubic root of 3881985 is about 157.1633525019.

The spelling of 3881985 in words is "three million, eight hundred eighty-one thousand, nine hundred eighty-five".