1388189 has 4 divisors (see below), whose sum is σ = 1514400. Its totient is φ = 1261980.

The previous prime is 1388183. The next prime is 1388227. The reversal of 1388189 is 9818831.

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.

It is a cyclic number.

It is not a de Polignac number, because 1388189 - 2²⁰ = 339613 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 (1388183) 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, 63089 + ... + 63110.

It is an arithmetic number, because the mean of its divisors is an integer number (378600).

2^1388189 is an apocalyptic number.

It is an amenable number.

1388189 is a deficient number, since it is larger than the sum of its proper divisors (126211).

1388189 is a wasteful number, since it uses less digits than its factorization.

1388189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126210.

The product of its digits is 13824, while the sum is 38.

The square root of 1388189 is about 1178.2143268523. The cubic root of 1388189 is about 111.5534140508.

The spelling of 1388189 in words is "one million, three hundred eighty-eight thousand, one hundred eighty-nine".