999018000 has 120 divisors (see below), whose sum is σ = 3489299736. Its totient is φ = 266400000.

The previous prime is 999017993. The next prime is 999018001. The reversal of 999018000 is 810999.

999018000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1468944 + 997549056 = 1212^2 + 31584^2 .

It is a tau number, because it is divible by the number of its divisors (120).

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 (999018001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9751 + ... + 45750.

Almost surely, 2^999018000 is an apocalyptic number.

999018000 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 999018000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1744649868).

999018000 is an abundant number, since it is smaller than the sum of its proper divisors (2490281736).

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

999018000 is a wasteful number, since it uses less digits than its factorization.

999018000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55530 (or 55511 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 999018000 is about 31607.2460046743. The cubic root of 999018000 is about 999.6725594611.

Adding to 999018000 its reverse (810999), we get a palindrome (999828999).

The spelling of 999018000 in words is "nine hundred ninety-nine million, eighteen thousand".