988444444890 has 256 divisors, whose sum is σ = 2948227891200. Its totient is φ = 211506704640.

The previous prime is 988444444861. The next prime is 988444444891. The reversal of 988444444890 is 98444444889.

It is a super-2 number, since 2×988444444890² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (988444444891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 11079060 + ... + 11167920.

It is an arithmetic number, because the mean of its divisors is an integer number (11516515200).

Almost surely, 2^988444444890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 988444444890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1474113945600).

988444444890 is an abundant number, since it is smaller than the sum of its proper divisors (1959783446310).

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

988444444890 is a wasteful number, since it uses less digits than its factorization.

988444444890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88962 (or 88948 counting only the distinct ones).

The product of its (nonzero) digits is 169869312, while the sum is 66.

The spelling of 988444444890 in words is "nine hundred eighty-eight billion, four hundred forty-four million, four hundred forty-four thousand, eight hundred ninety".