3904649 has 8 divisors (see below), whose sum is σ = 4495680. Its totient is φ = 3321936.

The previous prime is 3904643. The next prime is 3904651. The reversal of 3904649 is 9464093.

It is a happy number.

3904649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3904649 - 2¹⁶ = 3839113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3904643) 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 7 ways as a sum of consecutive naturals, for example, 1034 + ... + 2979.

It is an arithmetic number, because the mean of its divisors is an integer number (561960).

Almost surely, 2^3904649 is an apocalyptic number.

It is an amenable number.

3904649 is a deficient number, since it is larger than the sum of its proper divisors (591031).

3904649 is a wasteful number, since it uses less digits than its factorization.

3904649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4159.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 3904649 is about 1976.0184715736. The cubic root of 3904649 is about 157.4686122049.

The spelling of 3904649 in words is "three million, nine hundred four thousand, six hundred forty-nine".