99309490398 has 16 divisors (see below), whose sum is σ = 220687756560. Its totient is φ = 33103163448.

The previous prime is 99309490391. The next prime is 99309490409. The reversal of 99309490398 is 89309490399.

It is a super-2 number, since 2×99309490398² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99309490391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 919532265 + ... + 919532372.

It is an arithmetic number, because the mean of its divisors is an integer number (13792984785).

Almost surely, 2^99309490398 is an apocalyptic number.

99309490398 is an abundant number, since it is smaller than the sum of its proper divisors (121378266162).

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

99309490398 is a wasteful number, since it uses less digits than its factorization.

99309490398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1839064648 (or 1839064642 counting only the distinct ones).

The product of its (nonzero) digits is 17006112, while the sum is 63.

Subtracting from 99309490398 its reverse (89309490399), we obtain a palindrome (9999999999).

The spelling of 99309490398 in words is "ninety-nine billion, three hundred nine million, four hundred ninety thousand, three hundred ninety-eight".