388665393 has 8 divisors (see below), whose sum is σ = 521653056. Its totient is φ = 257394000.

The previous prime is 388665313. The next prime is 388665397. The reversal of 388665393 is 393566883.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 388665393 - 2¹⁰ = 388664369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (388665397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428538 + ... + 429443.

It is an arithmetic number, because the mean of its divisors is an integer number (65206632).

Almost surely, 2^388665393 is an apocalyptic number.

It is an amenable number.

388665393 is a deficient number, since it is larger than the sum of its proper divisors (132987663).

388665393 is a wasteful number, since it uses less digits than its factorization.

388665393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858135.

The product of its digits is 2799360, while the sum is 51.

The square root of 388665393 is about 19714.5984742272. The cubic root of 388665393 is about 729.7800006351.

The spelling of 388665393 in words is "three hundred eighty-eight million, six hundred sixty-five thousand, three hundred ninety-three".