99998000 has 40 divisors (see below), whose sum is σ = 241800000. Its totient is φ = 39998400.

The previous prime is 99997981. The next prime is 99998021. The reversal of 99998000 is 89999.

It is a tau number, because it is divible by the number of its divisors (40).

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23000 + ... + 26999.

It is an arithmetic number, because the mean of its divisors is an integer number (6045000).

Almost surely, 2^99998000 is an apocalyptic number.

It is an amenable number.

99998000 is an abundant number, since it is smaller than the sum of its proper divisors (141802000).

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

99998000 is a wasteful number, since it uses less digits than its factorization.

99998000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50022 (or 50006 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 44.

The square root of 99998000 is about 9999.8999995000. The cubic root of 99998000 is about 464.1557889481.

The spelling of 99998000 in words is "ninety-nine million, nine hundred ninety-eight thousand".