3985189100 has 18 divisors (see below), whose sum is σ = 8647860564. Its totient is φ = 1594075600.

The previous prime is 3985189099. The next prime is 3985189111. The reversal of 3985189100 is 19815893.

It is a happy number.

3985189100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19925846 + ... + 19926045.

It is an arithmetic number, because the mean of its divisors is an integer number (480436698).

Almost surely, 2^3985189100 is an apocalyptic number.

It is an amenable number.

3985189100 is an abundant number, since it is smaller than the sum of its proper divisors (4662671464).

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

3985189100 is a wasteful number, since it uses less digits than its factorization.

3985189100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39851905 (or 39851898 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 44.

The square root of 3985189100 is about 63128.3541683133. The cubic root of 3985189100 is about 1585.4393922901.

The spelling of 3985189100 in words is "three billion, nine hundred eighty-five million, one hundred eighty-nine thousand, one hundred".