989444808 has 160 divisors (see below), whose sum is σ = 3049896960. Its totient is φ = 297198720.

The previous prime is 989444747. The next prime is 989444839. The reversal of 989444808 is 808444989.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 904710 + ... + 905802.

It is an arithmetic number, because the mean of its divisors is an integer number (19061856).

Almost surely, 2^989444808 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 989444808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1524948480).

989444808 is an abundant number, since it is smaller than the sum of its proper divisors (2060452152).

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

989444808 is a wasteful number, since it uses less digits than its factorization.

989444808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249 (or 1236 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 54.

The square root of 989444808 is about 31455.4416278011. The cubic root of 989444808 is about 996.4691504410.

The spelling of 989444808 in words is "nine hundred eighty-nine million, four hundred forty-four thousand, eight hundred eight".