3989641000 has 32 divisors (see below), whose sum is σ = 9335762280. Its totient is φ = 1595856000.

The previous prime is 3989640959. The next prime is 3989641009. The reversal of 3989641000 is 1469893.

It can be written as a sum of positive squares in 4 ways, for example, as 2554898116 + 1434742884 = 50546^2 + 37878^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (3989641009) 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 7 ways as a sum of consecutive naturals, for example, 1993821 + ... + 1995820.

Almost surely, 2^3989641000 is an apocalyptic number.

It is an amenable number.

3989641000 is an abundant number, since it is smaller than the sum of its proper divisors (5346121280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3989641000 is a wasteful number, since it uses less digits than its factorization.

3989641000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3989662 (or 3989648 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 3989641000 is about 63163.6050269457. The cubic root of 3989641000 is about 1586.0295433730.

The spelling of 3989641000 in words is "three billion, nine hundred eighty-nine million, six hundred forty-one thousand".