3985660 has 60 divisors (see below), whose sum is σ = 9881928. Its totient is φ = 1350048.

The previous prime is 3985637. The next prime is 3985661. The reversal of 3985660 is 665893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3985661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 47979 + ... + 48061.

Almost surely, 2^3985660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3985660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4940964).

3985660 is an abundant number, since it is smaller than the sum of its proper divisors (5896268).

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

3985660 is an equidigital number, since it uses as much as digits as its factorization.

3985660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 3985660 is about 1996.4117811714. The cubic root of 3985660 is about 158.5501836337.

The spelling of 3985660 in words is "three million, nine hundred eighty-five thousand, six hundred sixty".