1989541008 has 480 divisors, whose sum is σ = 7515590400. Its totient is φ = 491692032.

The previous prime is 1989541007. The next prime is 1989541013. The reversal of 1989541008 is 8001459891.

It is not an unprimeable number, because it can be changed into a prime (1989541007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8687838 + ... + 8688066.

It is an arithmetic number, because the mean of its divisors is an integer number (15657480).

Almost surely, 2^1989541008 is an apocalyptic number.

1989541008 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 1989541008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3757795200).

1989541008 is an abundant number, since it is smaller than the sum of its proper divisors (5526049392).

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

1989541008 is a wasteful number, since it uses less digits than its factorization.

1989541008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The square root of 1989541008 is about 44604.2711856163. The cubic root of 1989541008 is about 1257.7209596083.

The spelling of 1989541008 in words is "one billion, nine hundred eighty-nine million, five hundred forty-one thousand, eight".