9787089816 has 128 divisors (see below), whose sum is σ = 31656614400. Its totient is φ = 2743528320.

The previous prime is 9787089811. The next prime is 9787089847. The reversal of 9787089816 is 6189807879.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9787089811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19071 + ... + 141201.

It is an arithmetic number, because the mean of its divisors is an integer number (247317300).

Almost surely, 2^9787089816 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 9787089816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15828307200).

9787089816 is an abundant number, since it is smaller than the sum of its proper divisors (21869524584).

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

9787089816 is a wasteful number, since it uses less digits than its factorization.

9787089816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122206 (or 122196 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 63.

The square root of 9787089816 is about 98929.7216007404. The cubic root of 9787089816 is about 2139.0348382996.

The spelling of 9787089816 in words is "nine billion, seven hundred eighty-seven million, eighty-nine thousand, eight hundred sixteen".