99998998 has 48 divisors (see below), whose sum is σ = 176964480. Its totient is φ = 42197760.

The previous prime is 99998971. The next prime is 99998999. The reversal of 99998998 is 89989999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99998999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 448315 + ... + 448537.

It is an arithmetic number, because the mean of its divisors is an integer number (3686760).

Almost surely, 2^99998998 is an apocalyptic number.

99998998 is a deficient number, since it is larger than the sum of its proper divisors (76965482).

99998998 is a wasteful number, since it uses less digits than its factorization.

99998998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373 (or 362 counting only the distinct ones).

The product of its digits is 34012224, while the sum is 70.

The square root of 99998998 is about 9999.9498998745. The cubic root of 99998998 is about 464.1573330654.

The spelling of 99998998 in words is "ninety-nine million, nine hundred ninety-eight thousand, nine hundred ninety-eight".