989606880 has 144 divisors (see below), whose sum is σ = 3394080144. Its totient is φ = 262563840.

The previous prime is 989606869. The next prime is 989606897. The reversal of 989606880 is 88606989.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 302212 + ... + 305468.

It is an arithmetic number, because the mean of its divisors is an integer number (23570001).

Almost surely, 2^989606880 is an apocalyptic number.

989606880 is a gapful number since it is divisible by the number (90) 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 989606880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1697040072).

989606880 is an abundant number, since it is smaller than the sum of its proper divisors (2404473264).

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

989606880 is a wasteful number, since it uses less digits than its factorization.

989606880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3489 (or 3478 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The square root of 989606880 is about 31458.0177379313. The cubic root of 989606880 is about 996.5235550019.

The spelling of 989606880 in words is "nine hundred eighty-nine million, six hundred six thousand, eight hundred eighty".