388518222 has 16 divisors (see below), whose sum is σ = 777248640. Its totient is φ = 129470712.

The previous prime is 388518217. The next prime is 388518223. The reversal of 388518222 is 222815883.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388518223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24823 + ... + 37325.

It is an arithmetic number, because the mean of its divisors is an integer number (48578040).

Almost surely, 2^388518222 is an apocalyptic number.

388518222 is an abundant number, since it is smaller than the sum of its proper divisors (388730418).

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

388518222 is a wasteful number, since it uses less digits than its factorization.

388518222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17687.

The product of its digits is 61440, while the sum is 39.

The square root of 388518222 is about 19710.8655822112. The cubic root of 388518222 is about 729.6878768241.

The spelling of 388518222 in words is "three hundred eighty-eight million, five hundred eighteen thousand, two hundred twenty-two".