388655 has 4 divisors (see below), whose sum is σ = 466392. Its totient is φ = 310920.

The previous prime is 388651. The next prime is 388657. The reversal of 388655 is 556883.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 388655 - 2² = 388651 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388651) 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, 38861 + ... + 38870.

It is an arithmetic number, because the mean of its divisors is an integer number (116598).

2³⁸⁸⁶⁵⁵ is an apocalyptic number.

388655 is a deficient number, since it is larger than the sum of its proper divisors (77737).

388655 is an equidigital number, since it uses as much as digits as its factorization.

388655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77736.

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

The square root of 388655 is about 623.4220079529. The cubic root of 388655 is about 72.9773495750.

The spelling of 388655 in words is "three hundred eighty-eight thousand, six hundred fifty-five".