3896649 has 6 divisors (see below), whose sum is σ = 5628506. Its totient is φ = 2597760.

The previous prime is 3896609. The next prime is 3896657. The reversal of 3896649 is 9466983.

It can be written as a sum of positive squares in only one way, i.e., 3732624 + 164025 = 1932^2 + 405^2 .

It is a de Polignac number, because none of the positive numbers 2^k-3896649 is a prime.

It is a Duffinian number.

3896649 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3896609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 216472 + ... + 216489.

Almost surely, 2^3896649 is an apocalyptic number.

It is an amenable number.

3896649 is a deficient number, since it is larger than the sum of its proper divisors (1731857).

3896649 is a wasteful number, since it uses less digits than its factorization.

3896649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432967 (or 432964 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 3896649 is about 1973.9931610824. The cubic root of 3896649 is about 157.3609960258.

The spelling of 3896649 in words is "three million, eight hundred ninety-six thousand, six hundred forty-nine".