2189784512 has 28 divisors (see below), whose sum is σ = 4383822576. Its totient is φ = 1085199360.

The previous prime is 2189784511. The next prime is 2189784521. The reversal of 2189784512 is 2154879812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2189784511) 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, 144164 + ... + 158627.

It is an arithmetic number, because the mean of its divisors is an integer number (156565092).

Almost surely, 2^2189784512 is an apocalyptic number.

It is an amenable number.

2189784512 is an abundant number, since it is smaller than the sum of its proper divisors (2194038064).

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

2189784512 is a wasteful number, since it uses less digits than its factorization.

2189784512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302916 (or 302906 counting only the distinct ones).

The product of its digits is 322560, while the sum is 47.

The square root of 2189784512 is about 46795.1334221840. The cubic root of 2189784512 is about 1298.5752659587.

The spelling of 2189784512 in words is "two billion, one hundred eighty-nine million, seven hundred eighty-four thousand, five hundred twelve".