4003986 has 24 divisors (see below), whose sum is σ = 9316080. Its totient is φ = 1143912.

The previous prime is 4003981. The next prime is 4003999. The reversal of 4003986 is 6893004.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (4003981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6516 + ... + 7103.

It is an arithmetic number, because the mean of its divisors is an integer number (388170).

Almost surely, 2^4003986 is an apocalyptic number.

4003986 is an abundant number, since it is smaller than the sum of its proper divisors (5312094).

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

4003986 is a wasteful number, since it uses less digits than its factorization.

4003986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13638 (or 13631 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 4003986 is about 2000.9962518706. The cubic root of 4003986 is about 158.7928158636.

The spelling of 4003986 in words is "four million, three thousand, nine hundred eighty-six".