3988551 has 24 divisors (see below), whose sum is σ = 6340224. Its totient is φ = 2222640.

The previous prime is 3988541. The next prime is 3988583. The reversal of 3988551 is 1558893.

It is not a de Polignac number, because 3988551 - 2⁵ = 3988519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3988531) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 6006 + ... + 6636.

It is an arithmetic number, because the mean of its divisors is an integer number (264176).

Almost surely, 2^3988551 is an apocalyptic number.

3988551 is a deficient number, since it is larger than the sum of its proper divisors (2351673).

3988551 is a wasteful number, since it uses less digits than its factorization.

3988551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691 (or 684 counting only the distinct ones).

The product of its digits is 43200, while the sum is 39.

The square root of 3988551 is about 1997.1356989449. The cubic root of 3988551 is about 158.5885091808.

The spelling of 3988551 in words is "three million, nine hundred eighty-eight thousand, five hundred fifty-one".