388681317 has 12 divisors (see below), whose sum is σ = 579539584. Its totient is φ = 250761960.

The previous prime is 388681253. The next prime is 388681333. The reversal of 388681317 is 713186883.

It is not a de Polignac number, because 388681317 - 2⁶ = 388681253 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 (388681417) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 696283 + ... + 696840.

Almost surely, 2^388681317 is an apocalyptic number.

It is an amenable number.

388681317 is a deficient number, since it is larger than the sum of its proper divisors (190858267).

388681317 is a wasteful number, since it uses less digits than its factorization.

388681317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393160 (or 1393157 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 388681317 is about 19715.0023332487. The cubic root of 388681317 is about 729.7899670983.

The spelling of 388681317 in words is "three hundred eighty-eight million, six hundred eighty-one thousand, three hundred seventeen".