1728789822 has 48 divisors (see below), whose sum is σ = 3949595520. Its totient is φ = 545000400.

The previous prime is 1728789809. The next prime is 1728789827. The reversal of 1728789822 is 2289878271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1728789827) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 211797 + ... + 219807.

It is an arithmetic number, because the mean of its divisors is an integer number (82283240).

Almost surely, 2^1728789822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1728789822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1974797760).

1728789822 is an abundant number, since it is smaller than the sum of its proper divisors (2220805698).

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

1728789822 is a wasteful number, since it uses less digits than its factorization.

1728789822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8669 (or 8666 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 54.

The square root of 1728789822 is about 41578.7183785167. The cubic root of 1728789822 is about 1200.1828013183.

The spelling of 1728789822 in words is "one billion, seven hundred twenty-eight million, seven hundred eighty-nine thousand, eight hundred twenty-two".