2188798 has 8 divisors (see below), whose sum is σ = 3289608. Its totient is φ = 1092264.

The previous prime is 2188789. The next prime is 2188799. The reversal of 2188798 is 8978812.

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 (2188799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1065 + ... + 2347.

It is an arithmetic number, because the mean of its divisors is an integer number (411201).

2^2188798 is an apocalyptic number.

2188798 is a deficient number, since it is larger than the sum of its proper divisors (1100810).

2188798 is a wasteful number, since it uses less digits than its factorization.

2188798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2138.

The product of its digits is 64512, while the sum is 43.

The square root of 2188798 is about 1479.4586847898. The cubic root of 2188798 is about 129.8380231166.

The spelling of 2188798 in words is "two million, one hundred eighty-eight thousand, seven hundred ninety-eight".