99998400000000 has 936 divisors, whose sum is σ = 338646482862912. Its totient is φ = 26240000000000.

The previous prime is 99998399999989. The next prime is 99998400000001. The reversal of 99998400000000 is 489999.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (99998400000001) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 398399999875 + ... + 398400000125.

Almost surely, 2^{99998400000000} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99998400000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169323241431456).

99998400000000 is an abundant number, since it is smaller than the sum of its proper divisors (238648082862912).

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

99998400000000 is an frugal number, since it uses more digits than its factorization.

99998400000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401 (or 344 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 48.

Adding to 99998400000000 its reverse (489999), we get a palindrome (99998400489999).

The spelling of 99998400000000 in words is "ninety-nine trillion, nine hundred ninety-eight billion, four hundred million", and thus it is an aban number.