388867216 has 20 divisors (see below), whose sum is σ = 753814972. Its totient is φ = 194334336.

The previous prime is 388867183. The next prime is 388867229. The reversal of 388867216 is 612768883.

It can be written as a sum of positive squares in 2 ways, for example, as 216207616 + 172659600 = 14704^2 + 13140^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 388867216.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 34006 + ... + 43978.

Almost surely, 2^388867216 is an apocalyptic number.

It is an amenable number.

388867216 is a deficient number, since it is larger than the sum of its proper divisors (364947756).

388867216 is a wasteful number, since it uses less digits than its factorization.

388867216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12418 (or 12412 counting only the distinct ones).

The product of its digits is 774144, while the sum is 49.

The square root of 388867216 is about 19719.7164279814. The cubic root of 388867216 is about 729.9062968487.

The spelling of 388867216 in words is "three hundred eighty-eight million, eight hundred sixty-seven thousand, two hundred sixteen".