388565 has 4 divisors (see below), whose sum is σ = 466284. Its totient is φ = 310848.

The previous prime is 388541. The next prime is 388567. The reversal of 388565 is 565883.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 565883 = 173 ⋅3271.

It can be written as a sum of positive squares in 2 ways, for example, as 164836 + 223729 = 406^2 + 473^2 .

It is a cyclic number.

It is not a de Polignac number, because 388565 - 2¹² = 384469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388567) 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 3 ways as a sum of consecutive naturals, for example, 38852 + ... + 38861.

It is an arithmetic number, because the mean of its divisors is an integer number (116571).

2³⁸⁸⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

388565 is a deficient number, since it is larger than the sum of its proper divisors (77719).

388565 is an equidigital number, since it uses as much as digits as its factorization.

388565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77718.

The product of its digits is 28800, while the sum is 35.

The square root of 388565 is about 623.3498215288. The cubic root of 388565 is about 72.9717160710.

The spelling of 388565 in words is "three hundred eighty-eight thousand, five hundred sixty-five".