989444736 has 192 divisors, whose sum is σ = 3366979200. Its totient is φ = 272885760.

The previous prime is 989444723. The next prime is 989444737. The reversal of 989444736 is 637444989.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (192).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (989444737) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 231741 + ... + 235971.

It is an arithmetic number, because the mean of its divisors is an integer number (17536350).

Almost surely, 2^989444736 is an apocalyptic number.

989444736 is a gapful number since it is divisible by the number (96) 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 989444736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1683489600).

989444736 is an abundant number, since it is smaller than the sum of its proper divisors (2377534464).

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

989444736 is a wasteful number, since it uses less digits than its factorization.

989444736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4287 (or 4272 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 54.

The square root of 989444736 is about 31455.4404833250. The cubic root of 989444736 is about 996.4691262706.

The spelling of 989444736 in words is "nine hundred eighty-nine million, four hundred forty-four thousand, seven hundred thirty-six".