3939849 has 12 divisors (see below), whose sum is σ = 5750836. Its totient is φ = 2598912.

The previous prime is 3939841. The next prime is 3939851. The reversal of 3939849 is 9489393.

It can be written as a sum of positive squares in 2 ways, for example, as 535824 + 3404025 = 732^2 + 1845^2 .

It is not a de Polignac number, because 3939849 - 2³ = 3939841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3939841) 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, 1384 + ... + 3129.

Almost surely, 2^3939849 is an apocalyptic number.

It is an amenable number.

3939849 is a deficient number, since it is larger than the sum of its proper divisors (1810987).

3939849 is a wasteful number, since it uses less digits than its factorization.

3939849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4616 (or 4613 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 3939849 is about 1984.9052874130. The cubic root of 3939849 is about 157.9403850297.

The spelling of 3939849 in words is "three million, nine hundred thirty-nine thousand, eight hundred forty-nine".