3984149845 has 16 divisors (see below), whose sum is σ = 5151469680. Its totient is φ = 2940585984.

The previous prime is 3984149839. The next prime is 3984149849. The reversal of 3984149845 is 5489414893.

It can be written as a sum of positive squares in 8 ways, for example, as 2792241 + 3981357604 = 1671^2 + 63098^2 .

It is a cyclic number.

It is not a de Polignac number, because 3984149845 - 2¹⁵ = 3984117077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3984149849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115911 + ... + 146299.

It is an arithmetic number, because the mean of its divisors is an integer number (321966855).

Almost surely, 2^3984149845 is an apocalyptic number.

It is an amenable number.

3984149845 is a deficient number, since it is larger than the sum of its proper divisors (1167319835).

3984149845 is a wasteful number, since it uses less digits than its factorization.

3984149845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32424.

The product of its digits is 4976640, while the sum is 55.

The square root of 3984149845 is about 63120.1223462059. The cubic root of 3984149845 is about 1585.3015636935.

The spelling of 3984149845 in words is "three billion, nine hundred eighty-four million, one hundred forty-nine thousand, eight hundred forty-five".