3987585647236 has 27 divisors (see below), whose sum is σ = 6993902517861. Its totient is φ = 1989337753104.

The previous prime is 3987585647203. The next prime is 3987585647239. The reversal of 3987585647236 is 6327465857893.

The square root of 3987585647236 is 1996894.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2491504402500 + 1496081244736 = 1578450^2 + 1223144^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3987585647239) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2472153966 + ... + 2472155578.

Almost surely, 2^{3987585647236} is an apocalyptic number.

3987585647236 is the 1996894-th square number.

It is an amenable number.

3987585647236 is a deficient number, since it is larger than the sum of its proper divisors (3006316870625).

3987585647236 is an frugal number, since it uses more digits than its factorization.

3987585647236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4468 (or 2234 counting only the distinct ones).

The product of its digits is 1828915200, while the sum is 73.

The spelling of 3987585647236 in words is "three trillion, nine hundred eighty-seven billion, five hundred eighty-five million, six hundred forty-seven thousand, two hundred thirty-six".