3985441902 has 144 divisors (see below), whose sum is σ = 9889326720. Its totient is φ = 1152247680.

The previous prime is 3985441897. The next prime is 3985441913. The reversal of 3985441902 is 2091445893.

3985441902 is a `hidden beast` number, since 3 + 98 + 544 + 19 + 0 + 2 = 666.

3985441902 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 8320099 + ... + 8320577.

It is an arithmetic number, because the mean of its divisors is an integer number (68675880).

Almost surely, 2^3985441902 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3985441902, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4944663360).

3985441902 is an abundant number, since it is smaller than the sum of its proper divisors (5903884818).

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

3985441902 is a wasteful number, since it uses less digits than its factorization.

3985441902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599 (or 565 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 3985441902 is about 63130.3564222475. The cubic root of 3985441902 is about 1585.4729159001.

The spelling of 3985441902 in words is "three billion, nine hundred eighty-five million, four hundred forty-one thousand, nine hundred two".