99129920 has 28 divisors (see below), whose sum is σ = 236053884. Its totient is φ = 39651840.

The previous prime is 99129913. The next prime is 99129929. The reversal of 99129920 is 2992199.

It can be written as a sum of positive squares in 2 ways, for example, as 38539264 + 60590656 = 6208^2 + 7784^2 .

It is not an unprimeable number, because it can be changed into a prime (99129929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154571 + ... + 155210.

Almost surely, 2^99129920 is an apocalyptic number.

It is an amenable number.

99129920 is an abundant number, since it is smaller than the sum of its proper divisors (136923964).

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

99129920 is a wasteful number, since it uses less digits than its factorization.

99129920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309798 (or 309788 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 41.

The square root of 99129920 is about 9956.4009561689. The cubic root of 99129920 is about 462.8087755470.

The spelling of 99129920 in words is "ninety-nine million, one hundred twenty-nine thousand, nine hundred twenty".