3987569928 has 64 divisors (see below), whose sum is σ = 10318809600. Its totient is φ = 1282775040.

The previous prime is 3987569893. The next prime is 3987569953. The reversal of 3987569928 is 8299657893.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 270328 + ... + 284696.

It is an arithmetic number, because the mean of its divisors is an integer number (161231400).

Almost surely, 2^3987569928 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 3987569928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5159404800).

3987569928 is an abundant number, since it is smaller than the sum of its proper divisors (6331239672).

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

3987569928 is a wasteful number, since it uses less digits than its factorization.

3987569928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14782 (or 14778 counting only the distinct ones).

The product of its digits is 58786560, while the sum is 66.

The square root of 3987569928 is about 63147.2083943542. The cubic root of 3987569928 is about 1585.7550533515.

The spelling of 3987569928 in words is "three billion, nine hundred eighty-seven million, five hundred sixty-nine thousand, nine hundred twenty-eight".