1989025684800 has 2016 divisors, whose sum is σ = 8686244044800. Its totient is φ = 389256806400.

The previous prime is 1989025684747. The next prime is 1989025684801. The reversal of 1989025684800 is 84865209891.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989025684801) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 8322283081 + ... + 8322283319.

It is an arithmetic number, because the mean of its divisors is an integer number (4308652800).

Almost surely, 2^{1989025684800} is an apocalyptic number.

1989025684800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1989025684800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4343122022400).

1989025684800 is an abundant number, since it is smaller than the sum of its proper divisors (6697218360000).

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

1989025684800 is a wasteful number, since it uses less digits than its factorization.

1989025684800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 60.

The spelling of 1989025684800 in words is "one trillion, nine hundred eighty-nine billion, twenty-five million, six hundred eighty-four thousand, eight hundred".