3949985 has 16 divisors (see below), whose sum is σ = 5186496. Its totient is φ = 2870208.

The previous prime is 3949969. The next prime is 3950029. The reversal of 3949985 is 5899493.

It is a cyclic number.

It is not a de Polignac number, because 3949985 - 2⁴ = 3949969 is a prime.

It is a Duffinian number.

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, 3902 + ... + 4808.

It is an arithmetic number, because the mean of its divisors is an integer number (324156).

Almost surely, 2^3949985 is an apocalyptic number.

It is an amenable number.

3949985 is a deficient number, since it is larger than the sum of its proper divisors (1236511).

3949985 is a wasteful number, since it uses less digits than its factorization.

3949985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992.

The product of its digits is 349920, while the sum is 47.

The square root of 3949985 is about 1987.4569177721. The cubic root of 3949985 is about 158.0757127917.

The spelling of 3949985 in words is "three million, nine hundred forty-nine thousand, nine hundred eighty-five".