1989328237344 has 432 divisors, whose sum is σ = 7150610638080. Its totient is φ = 521092776960.

The previous prime is 1989328237339. The next prime is 1989328237397. The reversal of 1989328237344 is 4437328239891.

1989328237344 is a `hidden beast` number, since 1 + 9 + 8 + 9 + 3 + 282 + 3 + 7 + 344 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

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

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 8192302 + ... + 8431634.

It is an arithmetic number, because the mean of its divisors is an integer number (16552339440).

Almost surely, 2^{1989328237344} is an apocalyptic number.

1989328237344 is a gapful number since it is divisible by the number (14) 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 1989328237344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3575305319040).

1989328237344 is an abundant number, since it is smaller than the sum of its proper divisors (5161282400736).

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

1989328237344 is a wasteful number, since it uses less digits than its factorization.

1989328237344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239413 (or 239395 counting only the distinct ones).

The product of its digits is 62705664, while the sum is 63.

The spelling of 1989328237344 in words is "one trillion, nine hundred eighty-nine billion, three hundred twenty-eight million, two hundred thirty-seven thousand, three hundred forty-four".