3988641 has 8 divisors (see below), whose sum is σ = 5340384. Its totient is φ = 2648000.

The previous prime is 3988627. The next prime is 3988643. The reversal of 3988641 is 1468893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3988641 - 2⁷ = 3988513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3988641.

It is not an unprimeable number, because it can be changed into a prime (3988643) 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, 1896 + ... + 3401.

It is an arithmetic number, because the mean of its divisors is an integer number (667548).

Almost surely, 2^3988641 is an apocalyptic number.

It is an amenable number.

3988641 is a deficient number, since it is larger than the sum of its proper divisors (1351743).

3988641 is a wasteful number, since it uses less digits than its factorization.

3988641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5551.

The product of its digits is 41472, while the sum is 39.

The square root of 3988641 is about 1997.1582310874. The cubic root of 3988641 is about 158.5897019998.

The spelling of 3988641 in words is "three million, nine hundred eighty-eight thousand, six hundred forty-one".