388920318 has 32 divisors (see below), whose sum is σ = 791347200. Its totient is φ = 127404576.

The previous prime is 388920313. The next prime is 388920331. The reversal of 388920318 is 813029883.

It is a super-2 number, since 2×388920318² = 302518027506442248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 388920318.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388920313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106755 + ... + 110337.

It is an arithmetic number, because the mean of its divisors is an integer number (24729600).

Almost surely, 2^388920318 is an apocalyptic number.

388920318 is an abundant number, since it is smaller than the sum of its proper divisors (402426882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

388920318 is a wasteful number, since it uses less digits than its factorization.

388920318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3896.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 388920318 is about 19721.0628009750. The cubic root of 388920318 is about 729.9395196031.

The spelling of 388920318 in words is "three hundred eighty-eight million, nine hundred twenty thousand, three hundred eighteen".