3996424649 has 16 divisors (see below), whose sum is σ = 4770307200. Its totient is φ = 3276422784.

The previous prime is 3996424637. The next prime is 3996424703. The reversal of 3996424649 is 9464246993.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3996424649 is a prime.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3996424594 and 3996424603.

It is not an unprimeable number, because it can be changed into a prime (3996424249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115484 + ... + 146045.

It is an arithmetic number, because the mean of its divisors is an integer number (298144200).

Almost surely, 2^3996424649 is an apocalyptic number.

It is an amenable number.

3996424649 is a deficient number, since it is larger than the sum of its proper divisors (773882551).

3996424649 is a wasteful number, since it uses less digits than its factorization.

3996424649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261632.

The product of its digits is 10077696, while the sum is 56.

The square root of 3996424649 is about 63217.2812528347. The cubic root of 3996424649 is about 1586.9279513202.

The spelling of 3996424649 in words is "three billion, nine hundred ninety-six million, four hundred twenty-four thousand, six hundred forty-nine".