2188439 has 16 divisors (see below), whose sum is σ = 2590080. Its totient is φ = 1827360.

The previous prime is 2188429. The next prime is 2188447. The reversal of 2188439 is 9348812.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2188439 - 2²⁰ = 1139863 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 2188399 and 2188408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2188409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7592 + ... + 7874.

It is an arithmetic number, because the mean of its divisors is an integer number (161880).

2^2188439 is an apocalyptic number.

2188439 is a deficient number, since it is larger than the sum of its proper divisors (401641).

2188439 is a wasteful number, since it uses less digits than its factorization.

2188439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350.

The product of its digits is 13824, while the sum is 35.

The square root of 2188439 is about 1479.3373516544. The cubic root of 2188439 is about 129.8309241824.

The spelling of 2188439 in words is "two million, one hundred eighty-eight thousand, four hundred thirty-nine".