388305117 has 32 divisors (see below), whose sum is σ = 591552000. Its totient is φ = 251619264.

The previous prime is 388305097. The next prime is 388305119. The reversal of 388305117 is 711503883.

It is not a de Polignac number, because 388305117 - 2¹² = 388301021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388305119) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 198259 + ... + 200207.

It is an arithmetic number, because the mean of its divisors is an integer number (18486000).

Almost surely, 2^388305117 is an apocalyptic number.

It is an amenable number.

388305117 is a deficient number, since it is larger than the sum of its proper divisors (203246883).

388305117 is a wasteful number, since it uses less digits than its factorization.

388305117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2162 (or 2156 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 388305117 is about 19705.4590659543. The cubic root of 388305117 is about 729.5544394323.

The spelling of 388305117 in words is "three hundred eighty-eight million, three hundred five thousand, one hundred seventeen".