2189784510 has 128 divisors (see below), whose sum is σ = 6052147200. Its totient is φ = 562826880.

The previous prime is 2189784497. The next prime is 2189784511. The reversal of 2189784510 is 154879812.

2189784510 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

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 63 ways as a sum of consecutive naturals, for example, 3322561 + ... + 3323219.

It is an arithmetic number, because the mean of its divisors is an integer number (47282400).

Almost surely, 2^2189784510 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2189784510, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3026073600).

2189784510 is an abundant number, since it is smaller than the sum of its proper divisors (3862362690).

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

2189784510 is a wasteful number, since it uses less digits than its factorization.

2189784510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103 (or 1097 counting only the distinct ones).

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

The square root of 2189784510 is about 46795.1334008142. The cubic root of 2189784510 is about 1298.5752655633.

The spelling of 2189784510 in words is "two billion, one hundred eighty-nine million, seven hundred eighty-four thousand, five hundred ten".