989740987200 has 672 divisors, whose sum is σ = 4144369664000. Its totient is φ = 225076008960.

The previous prime is 989740987129. The next prime is 989740987229. The reversal of 989740987200 is 2789047989.

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 60169377 + ... + 60185823.

Almost surely, 2^989740987200 is an apocalyptic number.

989740987200 is a gapful number since it is divisible by the number (90) 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 989740987200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2072184832000).

989740987200 is an abundant number, since it is smaller than the sum of its proper divisors (3154628676800).

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

989740987200 is a wasteful number, since it uses less digits than its factorization.

989740987200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16684 (or 16663 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 63.

The spelling of 989740987200 in words is "nine hundred eighty-nine billion, seven hundred forty million, nine hundred eighty-seven thousand, two hundred".