388390 has 8 divisors (see below), whose sum is σ = 699120. Its totient is φ = 155352.

The previous prime is 388373. The next prime is 388391. The reversal of 388390 is 93883.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19410 + ... + 19429.

It is an arithmetic number, because the mean of its divisors is an integer number (87390).

2³⁸⁸³⁹⁰ is an apocalyptic number.

388390 is a deficient number, since it is larger than the sum of its proper divisors (310730).

388390 is a wasteful number, since it uses less digits than its factorization.

388390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38846.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 388390 is about 623.2094351019. The cubic root of 388390 is about 72.9607595447.

The spelling of 388390 in words is "three hundred eighty-eight thousand, three hundred ninety".