3987938365 has 16 divisors (see below), whose sum is σ = 4817262528. Its totient is φ = 3169264896.

The previous prime is 3987938359. The next prime is 3987938417. The reversal of 3987938365 is 5638397893.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3987938365 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 472674 + ... + 481036.

It is an arithmetic number, because the mean of its divisors is an integer number (301078908).

Almost surely, 2^3987938365 is an apocalyptic number.

It is an amenable number.

3987938365 is a deficient number, since it is larger than the sum of its proper divisors (829324163).

3987938365 is a wasteful number, since it uses less digits than its factorization.

3987938365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8988.

The product of its digits is 29393280, while the sum is 61.

The square root of 3987938365 is about 63150.1256134934. The cubic root of 3987938365 is about 1585.8038911860.

The spelling of 3987938365 in words is "three billion, nine hundred eighty-seven million, nine hundred thirty-eight thousand, three hundred sixty-five".