9998888900 has 576 divisors, whose sum is σ = 31413989376. Its totient is φ = 2661120000.

The previous prime is 9998888897. The next prime is 9998888957. The reversal of 9998888900 is 98888999.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 98998850 + ... + 98998950.

It is an arithmetic number, because the mean of its divisors is an integer number (54538176).

Almost surely, 2^9998888900 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 9998888900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15706994688).

9998888900 is an abundant number, since it is smaller than the sum of its proper divisors (21415100476).

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

9998888900 is a wasteful number, since it uses less digits than its factorization.

9998888900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 26873856, while the sum is 68.

The square root of 9998888900 is about 99994.4443456735. Note that the first 3 decimals coincide. The cubic root of 9998888900 is about 2154.3548939970.

It can be divided in two parts, 9998 and 888900, that added together give a palindrome (898898).

The spelling of 9998888900 in words is "nine billion, nine hundred ninety-eight million, eight hundred eighty-eight thousand, nine hundred".