3985441901 has 12 divisors (see below), whose sum is σ = 4723603452. Its totient is φ = 3351636288.

The previous prime is 3985441897. The next prime is 3985441913. The reversal of 3985441901 is 1091445893.

3985441901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2465221801 + 1520220100 = 49651^2 + 38990^2 .

It is not a de Polignac number, because 3985441901 - 2² = 3985441897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3985441931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 764720 + ... + 769913.

It is an arithmetic number, because the mean of its divisors is an integer number (393633621).

Almost surely, 2^3985441901 is an apocalyptic number.

It is an amenable number.

3985441901 is a deficient number, since it is larger than the sum of its proper divisors (738161551).

3985441901 is a wasteful number, since it uses less digits than its factorization.

3985441901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1534700 (or 1534693 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 3985441901 is about 63130.3564143273. The cubic root of 3985441901 is about 1585.4729157675.

The spelling of 3985441901 in words is "three billion, nine hundred eighty-five million, four hundred forty-one thousand, nine hundred one".