99169728 has 168 divisors, whose sum is σ = 311334912. Its totient is φ = 27772416.

The previous prime is 99169723. The next prime is 99169729. The reversal of 99169728 is 82796199.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (168).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99169723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 780801 + ... + 780927.

It is an arithmetic number, because the mean of its divisors is an integer number (1853184).

Almost surely, 2^99169728 is an apocalyptic number.

99169728 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99169728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155667456).

99169728 is an abundant number, since it is smaller than the sum of its proper divisors (212165184).

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

99169728 is a wasteful number, since it uses less digits than its factorization.

99169728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239 (or 222 counting only the distinct ones).

The product of its digits is 489888, while the sum is 51.

The square root of 99169728 is about 9958.3998714653. The cubic root of 99169728 is about 462.8707179157.

The spelling of 99169728 in words is "ninety-nine million, one hundred sixty-nine thousand, seven hundred twenty-eight".