3988986 has 16 divisors (see below), whose sum is σ = 7997664. Its totient is φ = 1326384.

The previous prime is 3988969. The next prime is 3988991. The reversal of 3988986 is 6898893.

It is a nialpdrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3945 + ... + 4851.

It is an arithmetic number, because the mean of its divisors is an integer number (499854).

Almost surely, 2^3988986 is an apocalyptic number.

3988986 is an abundant number, since it is smaller than the sum of its proper divisors (4008678).

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

3988986 is a wasteful number, since it uses less digits than its factorization.

3988986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1645.

The product of its digits is 746496, while the sum is 51.

The square root of 3988986 is about 1997.2446019454. The cubic root of 3988986 is about 158.5942743065.

The spelling of 3988986 in words is "three million, nine hundred eighty-eight thousand, nine hundred eighty-six".