989239440 has 320 divisors, whose sum is σ = 3653337600. Its totient is φ = 221276160.

The previous prime is 989239423. The next prime is 989239451. The reversal of 989239440 is 44932989.

989239440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 989239440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5021422 + ... + 5021618.

It is an arithmetic number, because the mean of its divisors is an integer number (11416680).

Almost surely, 2^989239440 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 989239440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1826668800).

989239440 is an abundant number, since it is smaller than the sum of its proper divisors (2664098160).

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

989239440 is a wasteful number, since it uses less digits than its factorization.

989239440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295 (or 275 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 48.

The square root of 989239440 is about 31452.1770311691. The cubic root of 989239440 is about 996.4002036825.

The spelling of 989239440 in words is "nine hundred eighty-nine million, two hundred thirty-nine thousand, four hundred forty".