1989489816288 has 576 divisors, whose sum is σ = 6431538806784. Its totient is φ = 579156480000.

The previous prime is 1989489816271. The next prime is 1989489816299. The reversal of 1989489816288 is 8826189849891.

It is a super-2 number, since 2×1989489816288² (a number of 25 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1046548138 + ... + 1046550038.

It is an arithmetic number, because the mean of its divisors is an integer number (11165865984).

Almost surely, 2^{1989489816288} is an apocalyptic number.

1989489816288 is a gapful number since it is divisible by the number (18) 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 1989489816288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3215769403392).

1989489816288 is an abundant number, since it is smaller than the sum of its proper divisors (4442048990496).

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

1989489816288 is a wasteful number, since it uses less digits than its factorization.

1989489816288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2159 (or 2148 counting only the distinct ones).

The product of its digits is 1146617856, while the sum is 81.

The spelling of 1989489816288 in words is "one trillion, nine hundred eighty-nine billion, four hundred eighty-nine million, eight hundred sixteen thousand, two hundred eighty-eight".