9999898830 has 48 divisors (see below), whose sum is σ = 27130165920. Its totient is φ = 2550698304.

The previous prime is 9999898829. The next prime is 9999898837. The reversal of 9999898830 is 388989999.

It is a super-2 number, since 2×9999898830² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999898837) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2413365 + ... + 2417504.

It is an arithmetic number, because the mean of its divisors is an integer number (565211790).

Almost surely, 2^9999898830 is an apocalyptic number.

9999898830 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

9999898830 is an abundant number, since it is smaller than the sum of its proper divisors (17130267090).

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

9999898830 is a wasteful number, since it uses less digits than its factorization.

9999898830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4830905 (or 4830902 counting only the distinct ones).

The product of its (nonzero) digits is 90699264, while the sum is 72.

The square root of 9999898830 is about 99999.4941487206. The cubic root of 9999898830 is about 2154.4274245355.

The spelling of 9999898830 in words is "nine billion, nine hundred ninety-nine million, eight hundred ninety-eight thousand, eight hundred thirty".