388434903 has 12 divisors (see below), whose sum is σ = 536025960. Its totient is φ = 249908736.

The previous prime is 388434899. The next prime is 388434911. The reversal of 388434903 is 309434883.

It is not a de Polignac number, because 388434903 - 2² = 388434899 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388434983) 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 11 ways as a sum of consecutive naturals, for example, 182775 + ... + 184887.

It is an arithmetic number, because the mean of its divisors is an integer number (44668830).

Almost surely, 2^388434903 is an apocalyptic number.

388434903 is a deficient number, since it is larger than the sum of its proper divisors (147591057).

388434903 is an frugal number, since it uses more digits than its factorization.

388434903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4258 (or 2145 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 42.

The square root of 388434903 is about 19708.7519391767. The cubic root of 388434903 is about 729.6357117798.

The spelling of 388434903 in words is "three hundred eighty-eight million, four hundred thirty-four thousand, nine hundred three".