2188838 has 8 divisors (see below), whose sum is σ = 3456120. Its totient is φ = 1036800.

The previous prime is 2188831. The next prime is 2188861. The reversal of 2188838 is 8388812.

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

It is a Harshad number since it is a multiple of its sum of digits (38), and also a Moran number because the ratio is a prime number: 57601 = 2188838 / (2 + 1 + 8 + 8 + 8 + 3 + 8).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2188831) 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, 28763 + ... + 28838.

It is an arithmetic number, because the mean of its divisors is an integer number (432015).

2^2188838 is an apocalyptic number.

2188838 is a deficient number, since it is larger than the sum of its proper divisors (1267282).

2188838 is a wasteful number, since it uses less digits than its factorization.

2188838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57622.

The product of its digits is 24576, while the sum is 38.

The square root of 2188838 is about 1479.4722031860. The cubic root of 2188838 is about 129.8388140361.

It can be divided in two parts, 21888 and 38, that multiplied together give a square (831744 = 912²).

The spelling of 2188838 in words is "two million, one hundred eighty-eight thousand, eight hundred thirty-eight".