388928169 has 32 divisors (see below), whose sum is σ = 660746240. Its totient is φ = 221487696.

The previous prime is 388928167. The next prime is 388928171. The reversal of 388928169 is 961829883.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (388928167) and next prime (388928171).

It is not a de Polignac number, because 388928169 - 2¹ = 388928167 is a prime.

It is a super-2 number, since 2×388928169² = 302530241283385122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (388928161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54672 + ... + 61374.

It is an arithmetic number, because the mean of its divisors is an integer number (20648320).

Almost surely, 2^388928169 is an apocalyptic number.

It is an amenable number.

388928169 is a deficient number, since it is larger than the sum of its proper divisors (271818071).

388928169 is a wasteful number, since it uses less digits than its factorization.

388928169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7026 (or 7020 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 54.

The square root of 388928169 is about 19721.2618511088. The cubic root of 388928169 is about 729.9444312490.

The spelling of 388928169 in words is "three hundred eighty-eight million, nine hundred twenty-eight thousand, one hundred sixty-nine".