2189404 has 12 divisors (see below), whose sum is σ = 4378864. Its totient is φ = 938304.

The previous prime is 2189399. The next prime is 2189417. The reversal of 2189404 is 4049812.

2189404 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 78193 = 2189404 / (2 + 1 + 8 + 9 + 4 + 0 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39069 + ... + 39124.

2^2189404 is an apocalyptic number.

It is an amenable number.

2189404 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2189404 is a wasteful number, since it uses less digits than its factorization.

2189404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78204 (or 78202 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 2189404 is about 1479.6634752537. The cubic root of 2189404 is about 129.8500045149.

The spelling of 2189404 in words is "two million, one hundred eighty-nine thousand, four hundred four".