3808649 has 4 divisors (see below), whose sum is σ = 4101636. Its totient is φ = 3515664.

The previous prime is 3808591. The next prime is 3808667. The reversal of 3808649 is 9468083.

3808649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1537600 + 2271049 = 1240^2 + 1507^2 .

It is a cyclic number.

It is not a de Polignac number, because 3808649 - 2¹² = 3804553 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3808549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146474 + ... + 146499.

It is an arithmetic number, because the mean of its divisors is an integer number (1025409).

Almost surely, 2^3808649 is an apocalyptic number.

It is an amenable number.

3808649 is a deficient number, since it is larger than the sum of its proper divisors (292987).

3808649 is a wasteful number, since it uses less digits than its factorization.

3808649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292986.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 3808649 is about 1951.5760297770. The cubic root of 3808649 is about 156.1673773314.

The spelling of 3808649 in words is "three million, eight hundred eight thousand, six hundred forty-nine".