99388398 has 16 divisors (see below), whose sum is σ = 202036176. Its totient is φ = 32586240.

The previous prime is 99388363. The next prime is 99388439. The reversal of 99388398 is 89388399.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 135411 + ... + 136142.

It is an arithmetic number, because the mean of its divisors is an integer number (12627261).

Almost surely, 2^99388398 is an apocalyptic number.

99388398 is an abundant number, since it is smaller than the sum of its proper divisors (102647778).

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

99388398 is a wasteful number, since it uses less digits than its factorization.

99388398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271619.

The product of its digits is 3359232, while the sum is 57.

The square root of 99388398 is about 9969.3729993415. The cubic root of 99388398 is about 463.2106793097.

Subtracting from 99388398 its reverse (89388399), we obtain a palindrome (9999999).

It can be divided in two parts, 9938 and 8398, that added together give a triangular number (18336 = T₁₉₁).

The spelling of 99388398 in words is "ninety-nine million, three hundred eighty-eight thousand, three hundred ninety-eight".