99111960 has 192 divisors, whose sum is σ = 339655680. Its totient is φ = 25032960.

The previous prime is 99111949. The next prime is 99111967. The reversal of 99111960 is 6911199.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99111967) 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 47 ways as a sum of consecutive naturals, for example, 926227 + ... + 926333.

It is an arithmetic number, because the mean of its divisors is an integer number (1769040).

Almost surely, 2^99111960 is an apocalyptic number.

99111960 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 99111960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169827840).

99111960 is an abundant number, since it is smaller than the sum of its proper divisors (240543720).

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

99111960 is a wasteful number, since it uses less digits than its factorization.

99111960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238 (or 231 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 36.

The square root of 99111960 is about 9955.4989829742. The cubic root of 99111960 is about 462.7808238528.

The spelling of 99111960 in words is "ninety-nine million, one hundred eleven thousand, nine hundred sixty".