999518112 has 144 divisors (see below), whose sum is σ = 2905943040. Its totient is φ = 325817856.

The previous prime is 999518099. The next prime is 999518141. The reversal of 999518112 is 211815999.

It is a tau number, because it is divible by the number of its divisors (144).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4482033 + ... + 4482255.

It is an arithmetic number, because the mean of its divisors is an integer number (20180160).

Almost surely, 2^999518112 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 999518112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1452971520).

999518112 is an abundant number, since it is smaller than the sum of its proper divisors (1906424928).

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

999518112 is a wasteful number, since it uses less digits than its factorization.

999518112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515 (or 504 counting only the distinct ones).

The product of its digits is 58320, while the sum is 45.

The square root of 999518112 is about 31615.1563652625. The cubic root of 999518112 is about 999.8393448580.

The spelling of 999518112 in words is "nine hundred ninety-nine million, five hundred eighteen thousand, one hundred twelve".