3987995 has 16 divisors (see below), whose sum is σ = 5391360. Its totient is φ = 2805600.

The previous prime is 3987943. The next prime is 3988003. The reversal of 3987995 is 5997893.

It is not a de Polignac number, because 3987995 - 2⁶ = 3987931 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 536 + ... + 2874.

It is an arithmetic number, because the mean of its divisors is an integer number (336960).

Almost surely, 2^3987995 is an apocalyptic number.

3987995 is a deficient number, since it is larger than the sum of its proper divisors (1403365).

3987995 is a wasteful number, since it uses less digits than its factorization.

3987995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2386.

The product of its digits is 612360, while the sum is 50.

The square root of 3987995 is about 1996.9964947390. The cubic root of 3987995 is about 158.5811398121.

The spelling of 3987995 in words is "three million, nine hundred eighty-seven thousand, nine hundred ninety-five".