989898900 has 72 divisors (see below), whose sum is σ = 2868608064. Its totient is φ = 263558400.

The previous prime is 989898887. The next prime is 989898929. The reversal of 989898900 is 9898989.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 220680 + ... + 225120.

Almost surely, 2^989898900 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 989898900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1434304032).

989898900 is an abundant number, since it is smaller than the sum of its proper divisors (1878709164).

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

989898900 is a wasteful number, since it uses less digits than its factorization.

989898900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5201 (or 5194 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 60.

The square root of 989898900 is about 31462.6588196230. The cubic root of 989898900 is about 996.6215657020.

989898900 divided by its reverse (9898989) gives a square (100 = 10²).

The spelling of 989898900 in words is "nine hundred eighty-nine million, eight hundred ninety-eight thousand, nine hundred".