989870208 has 128 divisors (see below), whose sum is σ = 2785171200. Its totient is φ = 310625280.

The previous prime is 989870197. The next prime is 989870249. The reversal of 989870208 is 802078989.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1539135 + ... + 1539777.

It is an arithmetic number, because the mean of its divisors is an integer number (21759150).

Almost surely, 2^989870208 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 989870208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1392585600).

989870208 is an abundant number, since it is smaller than the sum of its proper divisors (1795300992).

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

989870208 is a wasteful number, since it uses less digits than its factorization.

989870208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890 (or 878 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 51.

The square root of 989870208 is about 31462.2028472261. The cubic root of 989870208 is about 996.6119366573.

The spelling of 989870208 in words is "nine hundred eighty-nine million, eight hundred seventy thousand, two hundred eight".