388775 has 6 divisors (see below), whose sum is σ = 482112. Its totient is φ = 311000.

The previous prime is 388757. The next prime is 388777. The reversal of 388775 is 577883.

It is not a de Polignac number, because 388775 - 2⁶ = 388711 is a prime.

It is a super-2 number, since 2×388775² = 302292001250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388777) 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 5 ways as a sum of consecutive naturals, for example, 7751 + ... + 7800.

It is an arithmetic number, because the mean of its divisors is an integer number (80352).

2³⁸⁸⁷⁷⁵ is an apocalyptic number.

388775 is a deficient number, since it is larger than the sum of its proper divisors (93337).

388775 is a wasteful number, since it uses less digits than its factorization.

388775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15561 (or 15556 counting only the distinct ones).

The product of its digits is 47040, while the sum is 38.

The square root of 388775 is about 623.5182435182. The cubic root of 388775 is about 72.9848595610.

It can be divided in two parts, 388 and 775, that multiplied together give a triangular number (300700 = T₇₇₅).

The spelling of 388775 in words is "three hundred eighty-eight thousand, seven hundred seventy-five".