3987574656 has 128 divisors (see below), whose sum is σ = 11715597600. Its totient is φ = 1193730048.

The previous prime is 3987574639. The next prime is 3987574667. The reversal of 3987574656 is 6564757893.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 3987574656.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173910 + ... + 195498.

Almost surely, 2^3987574656 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 3987574656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5857798800).

3987574656 is an abundant number, since it is smaller than the sum of its proper divisors (7728022944).

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

3987574656 is a wasteful number, since it uses less digits than its factorization.

3987574656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21656 (or 21644 counting only the distinct ones).

The product of its digits is 38102400, while the sum is 60.

The square root of 3987574656 is about 63147.2458306774. The cubic root of 3987574656 is about 1585.7556800863.

The spelling of 3987574656 in words is "three billion, nine hundred eighty-seven million, five hundred seventy-four thousand, six hundred fifty-six".