3988440671 has 2 divisors, whose sum is σ = 3988440672. Its totient is φ = 3988440670.

The previous prime is 3988440667. The next prime is 3988440679. The reversal of 3988440671 is 1760448893.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3988440671 - 2² = 3988440667 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3988440679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1994220335 + 1994220336.

It is an arithmetic number, because the mean of its divisors is an integer number (1994220336).

Almost surely, 2^3988440671 is an apocalyptic number.

3988440671 is a deficient number, since it is larger than the sum of its proper divisors (1).

3988440671 is an equidigital number, since it uses as much as digits as its factorization.

3988440671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1161216, while the sum is 50.

The square root of 3988440671 is about 63154.1025666583. The cubic root of 3988440671 is about 1585.8704690595.

The spelling of 3988440671 in words is "three billion, nine hundred eighty-eight million, four hundred forty thousand, six hundred seventy-one".