2189678 has 8 divisors (see below), whose sum is σ = 3318672. Its totient is φ = 1083456.

The previous prime is 2189647. The next prime is 2189699. The reversal of 2189678 is 8769812.

2189678 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5450 + ... + 5837.

It is an arithmetic number, because the mean of its divisors is an integer number (414834).

2^2189678 is an apocalyptic number.

2189678 is a deficient number, since it is larger than the sum of its proper divisors (1128994).

2189678 is a wasteful number, since it uses less digits than its factorization.

2189678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11386.

The product of its digits is 48384, while the sum is 41.

The square root of 2189678 is about 1479.7560609776. The cubic root of 2189678 is about 129.8554211209.

The spelling of 2189678 in words is "two million, one hundred eighty-nine thousand, six hundred seventy-eight".