3988447 has 4 divisors (see below), whose sum is σ = 4013080. Its totient is φ = 3963816.

The previous prime is 3988441. The next prime is 3988451. The reversal of 3988447 is 7448893.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3988447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3988441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12072 + ... + 12397.

It is an arithmetic number, because the mean of its divisors is an integer number (1003270).

Almost surely, 2^3988447 is an apocalyptic number.

3988447 is the 1068-th centered heptagonal number.

3988447 is a deficient number, since it is larger than the sum of its proper divisors (24633).

3988447 is a wasteful number, since it uses less digits than its factorization.

3988447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24632.

The product of its digits is 193536, while the sum is 43.

The square root of 3988447 is about 1997.1096614858. The cubic root of 3988447 is about 158.5871307898.

The spelling of 3988447 in words is "three million, nine hundred eighty-eight thousand, four hundred forty-seven".