999045018 has 96 divisors (see below), whose sum is σ = 2354086800. Its totient is φ = 305031168.

The previous prime is 999045017. The next prime is 999045037. The reversal of 999045018 is 810540999.

It can be written as a sum of positive squares in 8 ways, for example, as 747092889 + 251952129 = 27333^2 + 15873^2 .

It is not an unprimeable number, because it can be changed into a prime (999045017) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 3713788 + ... + 3714056.

Almost surely, 2^999045018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999045018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1177043400).

999045018 is an abundant number, since it is smaller than the sum of its proper divisors (1355041782).

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

999045018 is a wasteful number, since it uses less digits than its factorization.

999045018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576 (or 573 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 999045018 is about 31607.6734037797. The cubic root of 999045018 is about 999.6815712806.

It can be divided in two parts, 9990450 and 18, that multiplied together give a square (179828100 = 13410²).

The spelling of 999045018 in words is "nine hundred ninety-nine million, forty-five thousand, eighteen".