9809909798 has 32 divisors (see below), whose sum is σ = 16909384800. Its totient is φ = 4230579456.

The previous prime is 9809909783. The next prime is 9809909801. The reversal of 9809909798 is 8979099089.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99953 + ... + 172076.

It is an arithmetic number, because the mean of its divisors is an integer number (528418275).

Almost surely, 2^9809909798 is an apocalyptic number.

9809909798 is a deficient number, since it is larger than the sum of its proper divisors (7099475002).

9809909798 is a wasteful number, since it uses less digits than its factorization.

9809909798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272136.

The product of its (nonzero) digits is 26453952, while the sum is 68.

The square root of 9809909798 is about 99044.9887576348. The cubic root of 9809909798 is about 2140.6960351267.

The spelling of 9809909798 in words is "nine billion, eight hundred nine million, nine hundred nine thousand, seven hundred ninety-eight".