3985445660 has 48 divisors (see below), whose sum is σ = 10127726784. Its totient is φ = 1286059008.

The previous prime is 3985445647. The next prime is 3985445663. The reversal of 3985445660 is 665445893.

3985445660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 3985445599 and 3985445608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3985445663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 834899 + ... + 839658.

It is an arithmetic number, because the mean of its divisors is an integer number (210994308).

Almost surely, 2^3985445660 is an apocalyptic number.

It is an amenable number.

3985445660 is an abundant number, since it is smaller than the sum of its proper divisors (6142281124).

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

3985445660 is a wasteful number, since it uses less digits than its factorization.

3985445660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674590 (or 1674588 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 50.

The square root of 3985445660 is about 63130.3861860515. The cubic root of 3985445660 is about 1585.4734142309.

The spelling of 3985445660 in words is "three billion, nine hundred eighty-five million, four hundred forty-five thousand, six hundred sixty".