989771082240 has 320 divisors, whose sum is σ = 3272083537536. Its totient is φ = 255086886912.

The previous prime is 989771082233. The next prime is 989771082331. The reversal of 989771082240 is 42280177989.

It is a tau number, because it is divible by the number of its divisors (320).

It is an unprimeable number.

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, 27253534 + ... + 27289826.

Almost surely, 2^989771082240 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 989771082240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1636041768768).

989771082240 is an abundant number, since it is smaller than the sum of its proper divisors (2282312455296).

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

989771082240 is a wasteful number, since it uses less digits than its factorization.

989771082240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36439 (or 36423 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 57.

The spelling of 989771082240 in words is "nine hundred eighty-nine billion, seven hundred seventy-one million, eighty-two thousand, two hundred forty".