9905018028 has 12 divisors (see below), whose sum is σ = 23111708760. Its totient is φ = 3301672672.

The previous prime is 9905018021. The next prime is 9905018033. The reversal of 9905018028 is 8208105099.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (9905018021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 412709073 + ... + 412709096.

It is an arithmetic number, because the mean of its divisors is an integer number (1925975730).

Almost surely, 2^9905018028 is an apocalyptic number.

It is an amenable number.

9905018028 is an abundant number, since it is smaller than the sum of its proper divisors (13206690732).

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

9905018028 is a wasteful number, since it uses less digits than its factorization.

9905018028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825418176 (or 825418174 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 42.

The square root of 9905018028 is about 99523.9570555753. The cubic root of 9905018028 is about 2147.5918975077.

The spelling of 9905018028 in words is "nine billion, nine hundred five million, eighteen thousand, twenty-eight".