3988566 has 12 divisors (see below), whose sum is σ = 8641932. Its totient is φ = 1329516.

The previous prime is 3988541. The next prime is 3988583. The reversal of 3988566 is 6658893.

3988566 is a `hidden beast` number, since 3 + 9 + 88 + 566 = 666.

It is a Curzon number.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 110776 + ... + 110811.

It is an arithmetic number, because the mean of its divisors is an integer number (720161).

Almost surely, 2^3988566 is an apocalyptic number.

3988566 is an abundant number, since it is smaller than the sum of its proper divisors (4653366).

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

3988566 is a wasteful number, since it uses less digits than its factorization.

3988566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221595 (or 221592 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 3988566 is about 1997.1394543196. The cubic root of 3988566 is about 158.5887079852.

It can be divided in two parts, 3988 and 566, that added together give a palindrome (4554).

The spelling of 3988566 in words is "three million, nine hundred eighty-eight thousand, five hundred sixty-six".