2189041785 has 24 divisors (see below), whose sum is σ = 4336388160. Its totient is φ = 1000704672.

The previous prime is 2189041769. The next prime is 2189041831. The reversal of 2189041785 is 5871409812.

It is not a de Polignac number, because 2189041785 - 2⁴ = 2189041769 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2189041785.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3474355 + ... + 3474984.

It is an arithmetic number, because the mean of its divisors is an integer number (180682840).

Almost surely, 2^2189041785 is an apocalyptic number.

It is an amenable number.

2189041785 is a deficient number, since it is larger than the sum of its proper divisors (2147346375).

2189041785 is a wasteful number, since it uses less digits than its factorization.

2189041785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6949357 (or 6949354 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The square root of 2189041785 is about 46787.1968063914. The cubic root of 2189041785 is about 1298.4284332496.

The spelling of 2189041785 in words is "two billion, one hundred eighty-nine million, forty-one thousand, seven hundred eighty-five".