99911800 has 24 divisors (see below), whose sum is σ = 232295400. Its totient is φ = 39964640.

The previous prime is 99911783. The next prime is 99911809. The reversal of 99911800 is 811999.

It is a self number, because there is not a number n which added to its sum of digits gives 99911800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99911809) 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 5 ways as a sum of consecutive naturals, for example, 249580 + ... + 249979.

It is an arithmetic number, because the mean of its divisors is an integer number (9678975).

Almost surely, 2^99911800 is an apocalyptic number.

It is an amenable number.

99911800 is an abundant number, since it is smaller than the sum of its proper divisors (132383600).

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

99911800 is a wasteful number, since it uses less digits than its factorization.

99911800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499575 (or 499566 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 37.

The square root of 99911800 is about 9995.5890271659. The cubic root of 99911800 is about 464.0223805099.

The spelling of 99911800 in words is "ninety-nine million, nine hundred eleven thousand, eight hundred".