3985901904 has 20 divisors (see below), whose sum is σ = 10296913376. Its totient is φ = 1328633952.

The previous prime is 3985901861. The next prime is 3985901917. The reversal of 3985901904 is 4091095893.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 83039623 = 3985901904 / (3 + 9 + 8 + 5 + 9 + 0 + 1 + 9 + 0 + 4).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 41519764 + ... + 41519859.

Almost surely, 2^3985901904 is an apocalyptic number.

It is an amenable number.

3985901904 is an abundant number, since it is smaller than the sum of its proper divisors (6311011472).

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

3985901904 is a wasteful number, since it uses less digits than its factorization.

3985901904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83039634 (or 83039628 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 48.

The square root of 3985901904 is about 63133.9995881775. Note that the first 3 decimals coincide. The cubic root of 3985901904 is about 1585.5339122858.

The spelling of 3985901904 in words is "three billion, nine hundred eighty-five million, nine hundred one thousand, nine hundred four".