3944985 has 16 divisors (see below), whose sum is σ = 6886080. Its totient is φ = 1912640.

The previous prime is 3944953. The next prime is 3944987. The reversal of 3944985 is 5894493.

It is not a de Polignac number, because 3944985 - 2⁵ = 3944953 is a prime.

3944985 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3944987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11790 + ... + 12119.

It is an arithmetic number, because the mean of its divisors is an integer number (430380).

Almost surely, 2^3944985 is an apocalyptic number.

It is an amenable number.

3944985 is a deficient number, since it is larger than the sum of its proper divisors (2941095).

3944985 is a wasteful number, since it uses less digits than its factorization.

3944985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23928.

The product of its digits is 155520, while the sum is 42.

The square root of 3944985 is about 1986.1986305503. The cubic root of 3944985 is about 158.0089857625.

The spelling of 3944985 in words is "three million, nine hundred forty-four thousand, nine hundred eighty-five".