3989985748 has 24 divisors (see below), whose sum is σ = 8449382592. Its totient is φ = 1609405824.

The previous prime is 3989985733. The next prime is 3989985749. The reversal of 3989985748 is 8475899893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3989985749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4190686 + ... + 4191637.

It is an arithmetic number, because the mean of its divisors is an integer number (352057608).

Almost surely, 2^3989985748 is an apocalyptic number.

It is an amenable number.

3989985748 is an abundant number, since it is smaller than the sum of its proper divisors (4459396844).

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

3989985748 is a wasteful number, since it uses less digits than its factorization.

3989985748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8382351 (or 8382349 counting only the distinct ones).

The product of its digits is 156764160, while the sum is 70.

The square root of 3989985748 is about 63166.3339762567. Note that the first 3 decimals coincide. The cubic root of 3989985748 is about 1586.0752254085.

The spelling of 3989985748 in words is "three billion, nine hundred eighty-nine million, nine hundred eighty-five thousand, seven hundred forty-eight".