99111600 has 600 divisors, whose sum is σ = 446519040. Its totient is φ = 20528640.

The previous prime is 99111599. The next prime is 99111611. The reversal of 99111600 is 611199.

It is a tau number, because it is divible by the number of its divisors (600).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 4309189 + ... + 4309211.

Almost surely, 2^99111600 is an apocalyptic number.

99111600 is a gapful number since it is divisible by the number (90) 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 99111600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223259520).

99111600 is an abundant number, since it is smaller than the sum of its proper divisors (347407440).

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

99111600 is a wasteful number, since it uses less digits than its factorization.

99111600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 27.

The square root of 99111600 is about 9955.4809024979. The cubic root of 99111600 is about 462.7802635393.

Adding to 99111600 its reverse (611199), we get a palindrome (99722799).

It can be divided in two parts, 9911 and 1600, that added together give a palindrome (11511).

The spelling of 99111600 in words is "ninety-nine million, one hundred eleven thousand, six hundred".