388228729 has 8 divisors (see below), whose sum is σ = 467042240. Its totient is φ = 315253296.

The previous prime is 388228697. The next prime is 388228751. The reversal of 388228729 is 927822883.

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

It is a cyclic number.

It is not a de Polignac number, because 388228729 - 2⁵ = 388228697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (388228759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1459374 + ... + 1459639.

It is an arithmetic number, because the mean of its divisors is an integer number (58380280).

Almost surely, 2^388228729 is an apocalyptic number.

It is an amenable number.

388228729 is a deficient number, since it is larger than the sum of its proper divisors (78813511).

388228729 is a wasteful number, since it uses less digits than its factorization.

388228729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2919039.

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

The square root of 388228729 is about 19703.5207260022. The cubic root of 388228729 is about 729.5065965918.

The spelling of 388228729 in words is "three hundred eighty-eight million, two hundred twenty-eight thousand, seven hundred twenty-nine".