2189386409 has 16 divisors (see below), whose sum is σ = 2562244608. Its totient is φ = 1831615632.

The previous prime is 2189386391. The next prime is 2189386417. The reversal of 2189386409 is 9046839812.

It is a happy number.

2189386409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2189386409 - 2⁸ = 2189386153 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2189386469) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 807434 + ... + 810140.

It is an arithmetic number, because the mean of its divisors is an integer number (160140288).

Almost surely, 2^2189386409 is an apocalyptic number.

It is an amenable number.

2189386409 is a deficient number, since it is larger than the sum of its proper divisors (372858199).

2189386409 is a wasteful number, since it uses less digits than its factorization.

2189386409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5444.

The product of its (nonzero) digits is 746496, while the sum is 50.

The square root of 2189386409 is about 46790.8795493310. The cubic root of 2189386409 is about 1298.4965674935.

The spelling of 2189386409 in words is "two billion, one hundred eighty-nine million, three hundred eighty-six thousand, four hundred nine".