388189 has 4 divisors (see below), whose sum is σ = 408640. Its totient is φ = 367740.

The previous prime is 388187. The next prime is 388211. The reversal of 388189 is 981883.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 981883 = 7 ⋅140269.

It is a cyclic number.

It is not a de Polignac number, because 388189 - 2¹ = 388187 is a prime.

It is a Duffinian number.

388189 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10197 + ... + 10234.

It is an arithmetic number, because the mean of its divisors is an integer number (102160).

2³⁸⁸¹⁸⁹ is an apocalyptic number.

It is an amenable number.

388189 is a deficient number, since it is larger than the sum of its proper divisors (20451).

388189 is a wasteful number, since it uses less digits than its factorization.

388189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20450.

The product of its digits is 13824, while the sum is 37.

The square root of 388189 is about 623.0481522322. The cubic root of 388189 is about 72.9481711299.

The spelling of 388189 in words is "three hundred eighty-eight thousand, one hundred eighty-nine".