99989838 has 24 divisors (see below), whose sum is σ = 233310168. Its totient is φ = 30766032.

The previous prime is 99989833. The next prime is 99989863. The reversal of 99989838 is 83898999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99989833) 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 11 ways as a sum of consecutive naturals, for example, 213420 + ... + 213887.

It is an arithmetic number, because the mean of its divisors is an integer number (9721257).

Almost surely, 2^99989838 is an apocalyptic number.

99989838 is an abundant number, since it is smaller than the sum of its proper divisors (133320330).

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

99989838 is a wasteful number, since it uses less digits than its factorization.

99989838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427328 (or 427325 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 63.

The square root of 99989838 is about 9999.4918870911. The cubic root of 99989838 is about 464.1431602201.

The spelling of 99989838 in words is "ninety-nine million, nine hundred eighty-nine thousand, eight hundred thirty-eight".