1789421568 has 288 divisors, whose sum is σ = 5489920800. Its totient is φ = 517242880.

The previous prime is 1789421467. The next prime is 1789421573. The reversal of 1789421568 is 8651249871.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

Its product of digits (967680) is a multiple of the sum of its prime divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 1789421568.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21559255 + ... + 21559337.

It is an arithmetic number, because the mean of its divisors is an integer number (19062225).

Almost surely, 2^1789421568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1789421568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2744960400).

1789421568 is an abundant number, since it is smaller than the sum of its proper divisors (3700499232).

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

1789421568 is a wasteful number, since it uses less digits than its factorization.

1789421568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159 (or 128 counting only the distinct ones).

The product of its digits is 967680, while the sum is 51.

The square root of 1789421568 is about 42301.5551487176. Note that the first 3 decimals coincide. The cubic root of 1789421568 is about 1214.0527467544.

The spelling of 1789421568 in words is "one billion, seven hundred eighty-nine million, four hundred twenty-one thousand, five hundred sixty-eight".