3985386040 has 64 divisors (see below), whose sum is σ = 9743616000. Its totient is φ = 1461525120.

The previous prime is 3985386037. The next prime is 3985386049. The reversal of 3985386040 is 406835893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3985386049) 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, 61020 + ... + 108139.

It is an arithmetic number, because the mean of its divisors is an integer number (152244000).

Almost surely, 2^3985386040 is an apocalyptic number.

It is an amenable number.

3985386040 is an abundant number, since it is smaller than the sum of its proper divisors (5758229960).

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

3985386040 is a wasteful number, since it uses less digits than its factorization.

3985386040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169220 (or 169216 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 46.

The square root of 3985386040 is about 63129.9139869523. The cubic root of 3985386040 is about 1585.4655082646.

The spelling of 3985386040 in words is "three billion, nine hundred eighty-five million, three hundred eighty-six thousand, forty".