989323440 has 320 divisors, whose sum is σ = 3671764992. Its totient is φ = 215654400.

The previous prime is 989323421. The next prime is 989323453. The reversal of 989323440 is 44323989.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 989323392 and 989323401.

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 63 ways as a sum of consecutive naturals, for example, 3650505 + ... + 3650775.

Almost surely, 2^989323440 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 989323440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1835882496).

989323440 is an abundant number, since it is smaller than the sum of its proper divisors (2682441552).

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

989323440 is a wasteful number, since it uses less digits than its factorization.

989323440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 989323440 is about 31453.5123634865. The cubic root of 989323440 is about 996.4284055666.

It can be divided in two parts, 9893 and 23440, that added together give a palindrome (33333).

The spelling of 989323440 in words is "nine hundred eighty-nine million, three hundred twenty-three thousand, four hundred forty".