3987912 has 32 divisors (see below), whose sum is σ = 10087200. Its totient is φ = 1313664.

The previous prime is 3987887. The next prime is 3987913. The reversal of 3987912 is 2197893.

It is not an unprimeable number, because it can be changed into a prime (3987913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1203 + ... + 3069.

It is an arithmetic number, because the mean of its divisors is an integer number (315225).

Almost surely, 2^3987912 is an apocalyptic number.

It is an amenable number.

3987912 is an abundant number, since it is smaller than the sum of its proper divisors (6099288).

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

3987912 is a wasteful number, since it uses less digits than its factorization.

3987912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1965 (or 1961 counting only the distinct ones).

The product of its digits is 27216, while the sum is 39.

The square root of 3987912 is about 1996.9757134227. The cubic root of 3987912 is about 158.5800396497.

The spelling of 3987912 in words is "three million, nine hundred eighty-seven thousand, nine hundred twelve".