388638671 has 2 divisors, whose sum is σ = 388638672. Its totient is φ = 388638670.

The previous prime is 388638589. The next prime is 388638707. The reversal of 388638671 is 176836883.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 388638671 - 2¹⁴ = 388622287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (388638571) 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 as a sum of consecutive naturals, namely, 194319335 + 194319336.

It is an arithmetic number, because the mean of its divisors is an integer number (194319336).

Almost surely, 2^388638671 is an apocalyptic number.

388638671 is a deficient number, since it is larger than the sum of its proper divisors (1).

388638671 is an equidigital number, since it uses as much as digits as its factorization.

388638671 is an odious number, because the sum of its binary digits is odd.

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

The square root of 388638671 is about 19713.9207414456. The cubic root of 388638671 is about 729.7632753417.

The spelling of 388638671 in words is "three hundred eighty-eight million, six hundred thirty-eight thousand, six hundred seventy-one".