989937240 has 128 divisors (see below), whose sum is σ = 3136320000. Its totient is φ = 249274368.

The previous prime is 989937197. The next prime is 989937253. The reversal of 989937240 is 42739989.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1023237 + ... + 1024203.

It is an arithmetic number, because the mean of its divisors is an integer number (24502500).

Almost surely, 2^989937240 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 989937240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1568160000).

989937240 is an abundant number, since it is smaller than the sum of its proper divisors (2146382760).

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

989937240 is a wasteful number, since it uses less digits than its factorization.

989937240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1449 (or 1445 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 51.

The square root of 989937240 is about 31463.2681074297. The cubic root of 989937240 is about 996.6344323282.

The spelling of 989937240 in words is "nine hundred eighty-nine million, nine hundred thirty-seven thousand, two hundred forty".