3988688 has 40 divisors (see below), whose sum is σ = 8544096. Its totient is φ = 1788800.

The previous prime is 3988687. The next prime is 3988703. The reversal of 3988688 is 8868893.

It is a super-2 number, since 2×3988688² = 31819263922688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3988681) 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, 22970 + ... + 23142.

Almost surely, 2^3988688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3988688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4272048).

3988688 is an abundant number, since it is smaller than the sum of its proper divisors (4555408).

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

3988688 is a wasteful number, since it uses less digits than its factorization.

3988688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323 (or 317 counting only the distinct ones).

The product of its digits is 663552, while the sum is 50.

The square root of 3988688 is about 1997.1699977718. The cubic root of 3988688 is about 158.5903249092.

The spelling of 3988688 in words is "three million, nine hundred eighty-eight thousand, six hundred eighty-eight".