99811320 has 128 divisors (see below), whose sum is σ = 353341440. Its totient is φ = 22072320.

The previous prime is 99811319. The next prime is 99811333. The reversal of 99811320 is 2311899.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24124 + ... + 27956.

It is an arithmetic number, because the mean of its divisors is an integer number (2760480).

Almost surely, 2^99811320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99811320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176670720).

99811320 is an abundant number, since it is smaller than the sum of its proper divisors (253530120).

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

99811320 is a wasteful number, since it uses less digits than its factorization.

99811320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3885 (or 3881 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 99811320 is about 9990.5615457791. The cubic root of 99811320 is about 463.8667745735.

The spelling of 99811320 in words is "ninety-nine million, eight hundred eleven thousand, three hundred twenty".