3988668 has 24 divisors (see below), whose sum is σ = 9461200. Its totient is φ = 1307520.

The previous prime is 3988667. The next prime is 3988679. The reversal of 3988668 is 8668893.

3988668 is nontrivially palindromic in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3988661) 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, 1993 + ... + 3456.

Almost surely, 2^3988668 is an apocalyptic number.

It is an amenable number.

3988668 is an abundant number, since it is smaller than the sum of its proper divisors (5472532).

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

3988668 is a wasteful number, since it uses less digits than its factorization.

3988668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5517 (or 5515 counting only the distinct ones).

The product of its digits is 497664, while the sum is 48.

The square root of 3988668 is about 1997.1649906805. The cubic root of 3988668 is about 158.5900598420.

It can be divided in two parts, 3988 and 668, that added together give a triangular number (4656 = T₉₆).

The spelling of 3988668 in words is "three million, nine hundred eighty-eight thousand, six hundred sixty-eight".