2189638 has 8 divisors (see below), whose sum is σ = 3583080. Its totient is φ = 995280.

The previous prime is 2189633. The next prime is 2189639. The reversal of 2189638 is 8369812.

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 junction number, because it is equal to n+sod(n) for n = 2189597 and 2189606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2189633) 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, 49743 + ... + 49786.

It is an arithmetic number, because the mean of its divisors is an integer number (447885).

2^2189638 is an apocalyptic number.

2189638 is a deficient number, since it is larger than the sum of its proper divisors (1393442).

2189638 is a wasteful number, since it uses less digits than its factorization.

2189638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99542.

The product of its digits is 20736, while the sum is 37.

The square root of 2189638 is about 1479.7425451747. The cubic root of 2189638 is about 129.8546304037.

The spelling of 2189638 in words is "two million, one hundred eighty-nine thousand, six hundred thirty-eight".