999200000 has 108 divisors (see below), whose sum is σ = 2494957500. Its totient is φ = 399360000.

The previous prime is 999199991. The next prime is 999200003. The reversal of 999200000 is 2999.

It can be written as a sum of positive squares in 6 ways, for example, as 858255616 + 140944384 = 29296^2 + 11872^2 .

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999200003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 799376 + ... + 800624.

Almost surely, 2^999200000 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 999200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1247478750).

999200000 is an abundant number, since it is smaller than the sum of its proper divisors (1495757500).

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

999200000 is an frugal number, since it uses more digits than its factorization.

999200000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1290 (or 1256 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 999200000 is about 31610.1249602086. The cubic root of 999200000 is about 999.7332621906.

Adding to 999200000 its reverse (2999), we get a palindrome (999202999).

The spelling of 999200000 in words is "nine hundred ninety-nine million, two hundred thousand".