989898787898860 has 48 divisors (see below), whose sum is σ = 2375947567135296. Its totient is φ = 339366659254272.

The previous prime is 989898787898833. The next prime is 989898787898861. The reversal of 989898787898860 is 68898787898989.

It is a super-2 number, since 2×989898787898860² (a number of 31 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (989898787898861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 281694237 + ... + 285186676.

It is an arithmetic number, because the mean of its divisors is an integer number (49498907648652).

Almost surely, 2^{989898787898860} is an apocalyptic number.

It is an amenable number.

989898787898860 is an abundant number, since it is smaller than the sum of its proper divisors (1386048779236436).

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

989898787898860 is a wasteful number, since it uses less digits than its factorization.

989898787898860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566893402 (or 566893400 counting only the distinct ones).

The product of its (nonzero) digits is 4045267795968, while the sum is 112.

The spelling of 989898787898860 in words is "nine hundred eighty-nine trillion, eight hundred ninety-eight billion, seven hundred eighty-seven million, eight hundred ninety-eight thousand, eight hundred sixty".