3990149644 has 24 divisors (see below), whose sum is σ = 7915683440. Its totient is φ = 1744680384.

The previous prime is 3990149633. The next prime is 3990149659. The reversal of 3990149644 is 4469410993.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2018319 + ... + 2020294.

Almost surely, 2^3990149644 is an apocalyptic number.

It is an amenable number.

3990149644 is a deficient number, since it is larger than the sum of its proper divisors (3925533796).

3990149644 is a wasteful number, since it uses less digits than its factorization.

3990149644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4038649 (or 4038647 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 49.

The square root of 3990149644 is about 63167.6312995825. The cubic root of 3990149644 is about 1586.0969420964.

The spelling of 3990149644 in words is "three billion, nine hundred ninety million, one hundred forty-nine thousand, six hundred forty-four".