3989987748 has 60 divisors (see below), whose sum is σ = 10459975680. Its totient is φ = 1326252528.

The previous prime is 3989987741. The next prime is 3989987753. The reversal of 3989987748 is 8477899893.

3989987748 is a `hidden beast` number, since 398 + 99 + 87 + 74 + 8 = 666.

3989987748 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×3989987748² = 31840004458380223008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3989987741) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 99165 + ... + 133467.

It is an arithmetic number, because the mean of its divisors is an integer number (174332928).

Almost surely, 2^3989987748 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 3989987748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5229987840).

3989987748 is an abundant number, since it is smaller than the sum of its proper divisors (6469987932).

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

3989987748 is a wasteful number, since it uses less digits than its factorization.

3989987748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34678 (or 34667 counting only the distinct ones).

The product of its digits is 219469824, while the sum is 72.

The square root of 3989987748 is about 63166.3498074726. The cubic root of 3989987748 is about 1586.0754904178.

The spelling of 3989987748 in words is "three billion, nine hundred eighty-nine million, nine hundred eighty-seven thousand, seven hundred forty-eight".