989148840 has 128 divisors (see below), whose sum is σ = 3060288000. Its totient is φ = 255633408.

The previous prime is 989148829. The next prime is 989148847. The reversal of 989148840 is 48841989.

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

It is not an unprimeable number, because it can be changed into a prime (989148847) 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 31 ways as a sum of consecutive naturals, for example, 613956 + ... + 615564.

It is an arithmetic number, because the mean of its divisors is an integer number (23908500).

Almost surely, 2^989148840 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 989148840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1530144000).

989148840 is an abundant number, since it is smaller than the sum of its proper divisors (2071139160).

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

989148840 is a wasteful number, since it uses less digits than its factorization.

989148840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1779 (or 1775 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 51.

The square root of 989148840 is about 31450.7367163315. The cubic root of 989148840 is about 996.3697841464.

The spelling of 989148840 in words is "nine hundred eighty-nine million, one hundred forty-eight thousand, eight hundred forty".