2189406 has 32 divisors (see below), whose sum is σ = 4608000. Its totient is φ = 692640.

The previous prime is 2189399. The next prime is 2189417. The reversal of 2189406 is 6049812.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14620 + ... + 14768.

It is an arithmetic number, because the mean of its divisors is an integer number (144000).

2^2189406 is an apocalyptic number.

2189406 is an abundant number, since it is smaller than the sum of its proper divisors (2418594).

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

2189406 is a wasteful number, since it uses less digits than its factorization.

2189406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 2189406 is about 1479.6641510829. The cubic root of 2189406 is about 129.8500440538.

The spelling of 2189406 in words is "two million, one hundred eighty-nine thousand, four hundred six".